2206  Vina is born.   (speculation from "The Cage" and "Menagerie - Parts I and II"- she was listed as an adult in the Columbia's passenger list in 2236)

2209 The first case of transporter psychosis is diagnosed on Delinia II. (year given in "Realm of Fear", (TNG))

also in 2209, Rigel is admitted to the Federation.  (Star Trek Star Charts, p. 52)

2210   The is the year that Harry Kim's ancestor Jack supposedly piloted a deep space mission to Beta Capricus, while the rest of his crew is in stasis. When he finds no sign of life he turns around without waking up the crew. The ship didn't yet have a subspace transmitter ("11:59," Voyager).  This obviously was a very odd, and somewhat miserable mission.   It is uncertain why this sleeper ship would be in use at this time.  See also another entry in this timeline at 2070, which assumes Harry had the wrong date.

2214   Another spaceship disappears in the Taurean region of space, never to be heard from again.  ("Lorelei Signal" - TAS)

2215    Selcundi Drama begins to come apart, forming a asteroid belt.  (150 years before "Pen Pals")

2216    Christopher Pike is born  - he grows up in Mohave, California.   (speculation based on age of actor when "The Cage" was filmed (1964) - Mohave reference from "The Cage")

2217  The U.S.S. Valiant contacts Eminiar VII. The ship and crew become casualties of the ongoing war between Enimiar and Vendikar. ("A Taste of Armageddon", (TOS))

2218   A incident occurs which sours relations between the Klingons and the Federation (Bones indicated that the Klingons and UFP had been adversaries for 50 years in "Day of the Dove")

2219    Dr. Richard Daystrom is born.  (24 years before inventing duotronics - "Ultimate Computer")

2222   Montgomery "Scotty" Scott is born in Scotland on Earth. ("Relics", (TNG))

Pralor Unit 3947 is activated on the Pralor homeworld. (150 years before "Prototype" - VGR)

2223   Relations with the Klingon Empire further degenerate, giving rise to 70 years of unremitting hostility. (70 years before Star Trek VI: The Undiscovered Country, Star Trek Chronology).

2224   Sybok is born on Vulcan, son of Sarek and a Vulcan Princess. (Star Trek V, Star Trek Chronology)

2227  Leonard McCoy is born on Earth.  (137 years before "Encounter at Farpoint")

2229   Sarek and Amanda are married. (conjecture from "Journey to Babel", Star Trek Chronology)

Curzon Dax attempts to solve an Altonian brain teaser for the first time.  (140 years before "A Man Alone")

2230   Spock is born on Vulcan, son of Sarek and Amanda.   (sources: conjecture, Star Trek Chronology)

T'Pring is also born on Vulcan during this year.   ("Amok Time")

2231   George Samuel "Sam" Kirk is born in Iowa on Earth.  (conjecture from "Operation: Annihilate!")

March 22, 2233   James T. Kirk is born in Iowa on Earth.  (34 years before "Deadly Years")

2235  At age five, on Vulcan, young Spock plays a practical joke.  ("Yesteryear")

2234   At age 18, Christopher Pike enjoys picnicking near Mohave.  At this time he had a horse named Tango.  (speculation based on picnic sequence in "The Cage")

2236  The S.S. Columbia crashes on Talos IV. (eighteen years prior to "The Cage")   Sometime after this a threshold of velocity known as the "time barrier" is broken - which had been preventing high speed warp travel.

2237   Spock undergoes the kahs-wan ritual.  ("Yesteryear" (TAS)

Years later, Spock travels back in time to this period on Vulcan and meets himself at age seven.  ("Yesteryear" (TAS)

Spock and T'Pring are betrothed. They share each others minds in the Vulcan mind touch.  "Amok Time."

Hikaru Sulu is born in San Francisco.  (speculation, "Star Trek IV - The Voyage Home")

2239  Uhura is born in the United States of Africa on Earth.  (place of birth taken from classic Trek writer's guide)

Mr. Brack, who is later to be revealed as Flint, purchases the planet Holberg 917G.  (30 years before "Requiem for Methuselah")

2240    Scotty enters Starfleet Academy.   (conjecture - Star Trek Chronology, 1996 edition, p. 40)

2241   A starship disappears near the Taurus star system. It will be the sixth and last ship captured by the women of Taurus II.  ("Lorelei Signal")

2242    The Battle of Donatu V is fought near Sherman's Planet between Klingon and Federation forces.  (30 years before "Trouble with Tribbles")

2243    Scotty begins his career as a Starfleet engineer. (52 years prior to "Relics" - TNG)

Dr. Richard Daystrom invents duotronics, and is awarded the Nobel and Zee-Magnees prizes. (25 years prior to "Ultimate Computer:")

2244   M'Ress is born on the planet Cait.  (Curt Danhauser's animateds timeline)

Scotty graduates from Starfleet.   (Star Trek Chronology, 1996 edition, p. 41)

2245   The U.S.S. Enterprise, NCC-1701, is assembled in the San Francisco shipyards under the watchful eye of its future commander, Captain April.  ("Counterclock Incident")  One of the designers of the Enterprise is Laurence Marvick ("Is There in Truth no Beauty?") 

Captain April will command the starship on a five-year mission of exploration. His wife Sarah April is the ship's first Chief Medical Officer.   ("Counterclock Incident", Star Trek Chronology, p. 283)

Leonard McCoy, enters medical school at the University of Mississippi. He will complete an eight-year medical program and graduate in 2253.  "The Pirates of Orion" - TAS, "Trials and Tribble-ations" - DS9)

Pavel Chekov is born in Russia on Earth.  (22 years before "Who Mourns for Adonais?")  He is an only child.  ("Day of the Dove") 

2246   Kodos the Executioner seizes power on Tarsus IV, and ultimately orders 4,000 colonists killed.   James T. Kirk, age 13, and Kevin Riley are among nine people who witness the event and survive.   (20 years before "Conscience of the King")

2247  Lenore Karidian is born.  (19 years prior to "Conscience of the King")

2249   Garth of Izar, a Starfleet Fleet Captain, wins a key victory at Axanar, which helps preserve the United Federation of Planets.   ("Whom Gods Destroy" TOS - date conjecture)

Spock chooses Starfleet over the Vulcan Science Academy, and Sarek and Spock cease to speak to each other.  (20 years prior to "Journey to Babel")

Charlie Evans is born.  (17 years prior to "Charlie X")

2250   James T.  Kirk enrolls in Starfleet Academy.   (17 years prior to series, suggested by Classic Trek writer's guide)    He is helped to enter by the father of crewman Mallory who will later serve on the Enterprise. ("The Apple")   While a midshipman, he becomes friends with Ben Finney.  ("Court Martial")    Another person who Kirk meets while at the Academy is Gary Mitchell.  (15 years prior to "Where No Man Has Gone Before" - Mitchell describes Kirk as a lieutenant, but this doesn't quite give with the other data points) 

Captain Robert April relinquishes command of the Enterprise to Captain Christopher Pike. Pike's executive officer was a female Starfleet officer whom he called "Number One."  (Star Trek Chronology, 1996 edition p.44)

Starfleet officer Robert April is promoted to Commodore and becomes a Federation ambassador-at-large.  (20 years before "The Counter-Clock Incident." - TAS).

mid-23rd century    A Vulcan science mission is lost shortly after reporting a subspace rupture in the Hanoli System. ("If Wishes Were Horses")

2251    While still a Starfleet medical student, Leonard McCoy leads a mass innoculation program on Dramia II.  Shortly after McCoy's team leaves, an Auroral Plague kills almost the entire population of Dramia II.   (19 years before "Albatross."- TAS).

Jim Kirk becomes romantically involved with Ruth (fifteen years before "Shore Leave")

2252    Spock begins serving aboard the U.S.S. Enterprise (11 years, 4 months service with Captain Pike from "The Menagerie")

Charlie Evans, aged 3, is the sole survivor of a spaceship crash on Thasus  (14 years prior to "Charlie X")

2253       Sometime in here, Kirk is promoted to Ensign, and serves on the U.S.S. Republic.  During this time, his friendship with Finney ends when Kirk put Finney on report for failing to close the circuits to the atomic matter piles.  ("Court Marital").  Also, around this time, James T. Kirk goes on his first mission, as a Starfleet cadet: a peace mission to Axanar  (speculation from "Whom Gods Destroy" TOS)    

Leonard McCoy develops an impressive technique for creating axonal pathways between grafted neural tissue and basal ganglia.  (year given in "Liefsigns" - VGR)

2254    Crew of the Enterprise visits Rigel VII - which is undergoing a violent conflict.   (2 weeks before "The Cage")

Later in 2254    Events of The Cage, the original Star Trek pilot, which featured Captain Pike.    

Ten years before James T. Kirk takes command of the U.S.S. Enterprise, Captain Christopher Pike and his starship crew receive a distress signal from the planet Talos IV and beam down to investigate. Tracking the beacon, the landing party discovers crash survivors from a missing scientific expedition; among the survivors is a beautiful human female, Vina. Pike is concerned for the woman's safety, yet allows himself to become distracted by her beauty and is subsequently captured by the Talosians who live beneath the planet's surface. The distress signal and expedition survivors, except for Vina, are revealed to be but illusions created by the Talosians to lure the Enterprise and Pike to the planet.

The Talosians are a strong race, yet after decades of illusory indulgence, they have physically atrophied and need sturdy beings to rebuild and repopulate their barren planet. In Pike, with Vina, the Talosians hope they have finally found the one being who can serve as their breeding stock for a healthier and even more powerful race.

The Talosians use their power of illusion to interest Pike in Vina, presenting her in various disguises: a Rigellian princess in distress, a green Orion animal woman, and a loving, compassionate companion. When Pike resists, the Talosians lure Pike's female first officer and yeoman from the Enterprise to offer further temptation. By then, however, Pike has discovered that primitive human emotions neutralize the Talosians' ability to read minds, and he eventually escapes to the surface of the planet along with his fellow prisoners.

The Talosians confront Pike and the three prisoners before they can beam up, but the captain refuses to negotiate, threatening to kill himself and the others rather than submit to the Talosians' demands. Frightened at losing their only source of repopulation, the Talosians inspect the U.S.S. Enterprise's records and discover that the human race is far too independent to be of adequate service to them.

Faced with no other choice, the Talosians release the humans. After the first officer and yeoman beam up, Pike remains behind with Vina, urging her to leave with him. Despite her growing attraction to the captain, Vina is unable to leave the planet. It is revealed that an expedition had indeed crash landed on Talos IV. Vina, the only survivor, was greatly injured and disfigured. With the aid of the Talosians' illusions, however, she is able to appear beautiful and feel healthy.

The Talosians pledge to continue to provide Vina with the appearance of health and beauty while allowing her to roam the planet free of intervention. Realizing that she will be in good hands after all, Pike returns to the U.S.S. Enterprise. The Talosians, in an act of good will, send the captain an image of Vina on the starship's viewscreen. Not only is she beautiful again, aided by the Talosians' illusory powers, but by her side is another illusion — that of the handsome Christopher Pike.  (13 years before "The Menagerie")

Also in 2254, Jim Kirk graduates from Starfleet Academy after beating the Kobayashi Maru simulation.   (date conjecture, "Star Trek II - The Wrath of Khan")   Shortly thereafter, Jim is assigned to the Starship Farrugut under Captain Garrovick ("Obsession" - Garrovick was Kirk's "commanding officer from the day I left the Academy")   On his first planet survey on Neural, Kirk befriends Tyree. ("A Private Little War")

2255  Last contact between the Federation and the Sheliak Corporate prior to 2366.   (111 years prior to "Ensigns of Command")

Sulu enters the Academy (conjecture, Star Trek Chronology)

2256    Leonard McCoy has a relationship with Nancy Crater.  (ten years before "The Man Trap")

2258   Katie Wesley is born, she is the daughter of Robert Wesley, future captain of the Constitution-class U.S.S. Lexington.  (11 years before "One of Our Planets is Missing."  - TAS)

2259  The planet Cerberus is stricken by crop failure during Joanna McCoy's schooling there. Carter Winston uses his personal fortune to save the colony.  (10 years before "The Survivor" - TAS)

2264  Christopher Pike ends his service as Captain of the U.S.S. Enterprise and hands over command to James T. Kirk.    (Star Trek Chronology)   In the Mirror Universe, Kirk-2 becomes Captain of the I.S.S. Enterprise after assassination Christopher Pike-2.  (Mirror, Mirror)

Carter Winston crashes his spacecraft on the planet Vendor. Winston is nursed by a Vendorian, but will die a year later of his injuries.  (5 years before "The Survivor"- TAS)

Tuvok is born.  He will later serve aboard the U.S.S. Excelsior under Captain Sulu, and the U.S.S. Voyager under Captain Janeway.  ("Flashback" VGR)

Joran Belar is born.  He will later become a composer, and be the sixth host to the Dax symbiont.  He dies in 2285 after fleeing the scene of a murder he committed.    ("Equilibirum" - DS9)

January 2265              Stardate 1312.4 

Events of "Where No One Has Gone Before" the second Star Trek pilot, which featured Captain Kirk:

The Enterprise is en route to the edge of the galaxy, where a barrier of energy lies that has never been penetrated. When the Enterprise reaches the barrier, it is buffeted by intense energy, injuring many on board. First Officer Mitchell and psychological observer Dr. Dehner are affected as well, and it becomes apparent that their latent ESP abilities have been activated by contact with the barrier. The crew must then contend with the rapidly strengthening super-human beings who now consider the other people on board to be an inferior species.  A final confrontation occurs at Delta Vega.

(date is speculation)

(speculation based on significant changes between "Where No Man Has Gone Before" and the remainder of the series)

April 2265

The Enterprise heads out into space again, beginning a five year mission to to seek out new life and new civilizations, and boldly go where no man has gone before.  

April 2265 - April 2266
Events of the remainder of the first year  original Star Trek series (1966-1967 season). 

May 2265        Corbomite Maneuver, The

Stardate 1512.2: The Enterprise encounters a glowing cube in space. When Kirk discovers that the cube will follow the ship or block its path, he orders the cube destroyed. At this point, an enormous vessel appears, and alien captain Balok declares that he will destroy the Enterprise in minutes. Kirk bluffs his way out by claiming that all Federation vessels have "corbomite" aboard, which he will detonate if Balok threatens the crew. Balok attempts to escape in an escape craft, but the Enterprise catches up and contacts the real Balok - a representative of an alien race whose members, in adulthood, look like human children. Lt. Bailey, whose emotional outbursts had been disrupting the already fatalistic attitude on the Enterprise, agrees to stay with Balok as an "exchange student" so he may learn more about the diversity of life in the galaxy.

June 2265         Mudd’s Women
 

Stardate 1329.1: After stealing a freighter and pushing its engines to their limits in an effort to escape the pursuing Enterprise, Harry Mudd and his cargo - three seemingly irresistable women - are recovered. Although Mudd can't help but be suspicious, the women follow his instructions to cripple the Enterprise without any questions from the male members of the crew. The dilithium crystals powering the ship are sabotaged, and Mudd intends to force Kirk to bargain for his crew's life when the Enterprise arrives at a dilithium mining outpost.

August 2265    Enemy Within, The
 

Stardate 1672.1: As a landing party surveys a planet, a transporter malfunction splits Kirk into an aggressive aspect and a timid one. The aggressive Kirk threatens the security of the ship and crew, while the passive one tries to maintain his sanity and ability to command. In the meantime, the cause of the transporter problems haven't been determined, stranding Sulu and the team in the planet's subfreezing night temperatures while the two sides of Kirk's personality fight for control of the Enterprise.

September 2266        The Man Trap

Stardate 1531.1
 

Visiting Professor Crater and his wife (who, before marrying Crater, had a close relationship with McCoy), an Enterprise landing party starts to fall prey to an unknown assailant that seems to drain its victims of salt. Kirk is suspicious - and McCoy alarmed - when the Craters refuse, in spite of the threat, to evacuate their planet. The landing party returns to the Enterprise with an extra passenger - a shape shifter who can assume the shapes of Enterprise crewmembers and who has been living with Professor Crater in the guise of his late wife, whom the creature killed. The creature, in search of salt, sees the Enterprise as a promising hunting ground.  (Date is conjecture, based on the long held rule of thumb that Classic Star Trek took place 300 years after it was aired.  By that basis, Man Trap, the first episode aired, took place in September 2266, and serves as a reference point.)

October 2266    Naked Time, The

Stardate 1704.2: A member of a landing party investigating the ruins on a collapsing planet contracts an unknown infection and returns it to the Enterprise, where it spreads rapidly by touch. Lt. Riley locks himself in engineering and shuts down the engines, which may be needed to get the ship away to avoid damage from the planet's impending destruction. Kirk slowly begins to lose control, and even Spock is affected by the infection, while the planet's final phase of collapse begins with very little warning.

Time travel is first achieved by a Starfleet vessel - the U.S.S. Enterprise - in its escape from the gravity of Psi 2000.  "Naked Time" (TOS)   Date is conjecture

November 2266    Thanksgiving     Charlie X

Stardate 1533.6: Charlie, a young boy who reportedly grew up alone with only computer banks for company and teachers, is picked up by the crew of a starship and is transferred to the Enterprise for a trip to a starbase. During the trip, Charlie begins to learn more about human relationships and becomes infatuated with Yeoman Rand. When she tells him that he is too young for her, Charlie is enraged and begins to do away with members of the crew who he feels have been condescending to him - including Captain Kirk.

December 2265        Balance of Terror

Stardate 1709.1: Responding to distress calls from border outposts along the Neutral Zone between the Federation and the Romulan Star Empire, Kirk and the crew receive a final message from a Federation station reporting an attack from an invisible ship. Before the station is destroyed, it sends the Enterprise a brief view of the attacking vessel - a streamlined fighter which appears for a second when it fires. Hurrying to the scene, the Enterprise engages in battle with a Romulan Bird of Prey, armed with a cloaking device and commanded by a battle-scarred and tired commander whose crew is more eager to go into combat than he is. The Romulans, to the Enterprise crew's amazement, bear a stunning resemblance to Vulcans, which arouses suspicion in some, including Lt. Styles, whose father died in a battle with the Romulans years ago. But as long as the Romulan ship can remain invisible, the Enterprise is at a disadvantage.

December 2265         

What Are Little Girls Made Of?
 

Stardate 2712.4: The Enterprise is en route to visit Dr. Korby, a brilliant scientist working in isolation who also happens to be Nurse Chapel's fiance. Kirk and Chapel beam down and discover that Korby has used abandoned technology left behind by an extinct civilization to create android companions for himself - one of which, an attractive and very user-friendly "girl," arouses Chapel's suspicions. Korby, however, has become deranged in his isolation, and wants to take over the Enterprise so he can populate the "inferior" organic universe with androids...

Late December 2266           

Kirk attends a Christmas party along with Dr. Helen Noel.  (Dagger of the Mind)

January 2267        Dagger of the Mind

Stardate 2715.1: Kirk and ship's psychiatrist Dr. Noel visit a Federation mental hospital as the Enterprise delivers supplies. But one cargo container beamed aboard the ship contains an apparently insane stowaway from the facility on the planet who isn't a patient, but the second in command of the hospital's director, who has invented a device that can lock emotional impulses in or out of the brain permanently and is apparently used his invention without any discretion. Spock and the crew discover that Kirk and Dr. Noel are trapped on the planet, and are probably the next victims of the mind-altering machine.

January  2267       Miri

Stardate 2713.5: A remarkably Earthlike planet is the home of a human-like civilization whose entire adult population was wiped out by a virulent disease. The children remain, although their growth has been slowed down to the point that Miri - a teenage girl found by Kirk and a landing party - could easily by 300 years old. Miri develops a crush on Kirk, but at the same time reports back to a gang of unruly children who plot to kidnap the landing party, beginning with Yeoman Rand. Kirk, Rand and even Miri begin to show signs of the disease, which gives Kirk a chance to prove that the disease will eventually kill all of the children - but they are unwilling to admit they need help or the "stuffy" advice of an adult.    (date is conjecture - about a month after Dagger of the Mind)
 

January 2267   Yeoman Janice Rand leaves the U.S.S. Enterprise. She will receive further Starfleet training and become a transporter chief aboard the refit U.S.S. Enterprise in 2271. Rand will later receive her commission and in 2290 she will serve as communications officer on the U.S.S. Excelsior under Captain Hikaru Sulu.

January 2267    Conscience of the King, The
 

Stardate 2817.6: Kirk is contacted by Leighton, a friend from Kirk's stay on the Tarsus IV colony years ago, who believes that Kodos the Executioner, the militant dictator who gave the order for scores of people to die on the colony during Kirk's stay, is at large once more in the guise of touring Shakespearean actor Karidian, who, with his touring company, has stopped over at Leighton's post for a performance. Kirk isn't convinced until Leighton turns up dead, leaving Kirk and Lt. Riley the only remaining living witnesses of the Tarsus IV massacre. To investigate further, Kirk invites Karidian's company to travel on the Enterprise to their next performance, and attempts on Kirk and Riley's lives begin immediately.

January 2267    Galileo Seven, The

Stardate 2821.5: A shuttle commanded by Spock crash-lands on a savage planet where members of the shuttle crew are in immediate danger from the local life forms. The Enterprise must leave the area as soon as possible to deliver a much needed vaccine to a plague-stricken planet, and Commissioner Ferris insists that Kirk leave the Galileo crew for dead and get underway to the Enterprise's next destination. Meanwhile, Spock faces a command situation where total logic and rationality may be of no use if the crew of the shuttle is to return to the Enterprise.
 

January 2267    Court Martial

Stardate 2947.3: Kirk is accused of murder when the Enterprise's records officer, Lt. Commander Finney, is apparently jettisoned during a violent ion storm which threatened the ship. Kirk insists that he gave Finney even more time than safely allowed to get out of the jettisoned ion pod, yet the Enterprise computer's records show that Kirk discarded the pod, and Finney, while only at yellow alert when there was no sign of actual danger. Kirk challenges the findings of the computer and is court-martialed, with accusations that earlier rivalries with Finney when both were new officers caused Kirk to act maliciously - and even Kirk's attorney, Cogley, may not be able to convince the court that the error may have been the computer's.

February 2267    Menagerie - Part 1
 

Stardate 3012.4: The Enterprise is summoned to Starbase 6, apparently by Captain Pike, who commanded the ship before Kirk. Commodore Mendez shows Kirk, Spock and McCoy, however, that Pike was recently paralyzed in an accident and could not have signalled the Enterprise. Spock creates false messages from Kirk and sends them to the ship, instructing the crew that Spock and Pike will beam up immediately, the Enterprise will be piloted by computer to its next destination, and that Kirk will be staying behind. Kirk and Mendez follow the Enterprise in a shuttle, which runs out of fuel when Spock refuses to slow the Enterprise down so the shuttle can come aboard. Spock finally allows Kirk to catch up and then places himself under arrest. Kirk is unable to disconnect the computer from the helm, and Spock's court-martial begins. Spock offers, as evidence, visual records of a voyage on the Enterprise on which Spock and Pike served 13 years earlier. The bridge then informs Kirk and Mendez that the recording is being sent to the Enterprise from Talos IV - a planet that, according to Starfleet regulations, is absolutely off-limits to all vessels, punishable by death.

February 2267    Menagerie - Part II

Stardate 3013.1: Spock reveals that the Keeper of Talos IV has control of the viewscreen and the evidence being presented. The screen shows the events that occurred during Pike's visit to Talos IV in great detail, but Spock has difficulty convincing Kirk and Mendez of the validity of what they are seeing as well as the tremendous power of the Talosians. When the evidence suddenly stops, Mendez orders Kirk and Pike, the ranking officers forming Spock's trial board, to make their verdict, and all find Spock guilty. The final part of the record of Pike's adventure then continues, and then Commodore Mendez vanishes from the Enterprise. The Keeper himself tells Kirk that the Mendez that accompanied him in the shuttle and the trial was an illusion projected from Talos IV, and that Pike is welcome to return to the planet and be restored, as Vina was, to his former strength and health.

February 2267    Shore Leave

Stardate 3025.3: McCoy recommends a layover so the crew can rest from the constant strain of nonstop duties, and an earthlike but apparently uninhabited planet provides a perfect opportunity for shore leave, but when odd things begin happening on the surface, Kirk becomes suspicious. McCoy, after telling Sulu that the planet is like a setting from "Alice in Wonderland," spots a large rabbit followed by Alice herself. Kirk runs into his old nemesis, Academy prankster Finnegan, while Sulu discovers a police revolver that he doesn't have in his ancient firearms collection and later runs into a Samurai warrior. Mysterious tracking devices follow the crew's actions and thoughts, and whatever they happen to be thinking of seems to become real - even if it's a deadly threat, as McCoy discovers.
 

February 2267    Squire of Gothos, The

Stardate 2124.5: The Enterprise crew discovers that the ship cannot escape orbit of a planet that doesn't even exist on the star charts. Kirk and a landing party beam down to the surface of the mysterious planet and their captor is revealed to be the immature but powerful Trelane, who initially seems to be a student of ancient Earth history (as demonstrated by his 17th century mansion, clothes and furnishings). Kirk, discovering that Trelane's hold on the Enterprise comes from a power far beyond 23rd century technology, must try to beat Trelane at his own game, but Trelane rewrites the rules constantly to make sure he's winning.

March 2267    Arena

Stardate 3045.6: Arriving at a Federation planet at the request of a starbase director, the Enterprise finds a devastated world with only one survivor, who reveals that any summons Kirk received to visit the planet must have been a trap. The Enterprise locates and pursues an alien vessel right past the borders of the apparently omnipotent Metrons, who halt the ensuing battle and force Kirk and the captain of the other vessel - a huge, reptilian Gorn - to settle their differences in hand-to-hand combat...a prospect which immediately leaves Kirk at a disadvantage. Should he lose, the crew of the Enterprise will be destroyed.

March 2267    Alternative Factor, The

Stardate 3087.6: The Enterprise encounters brief but intense turbulence after entering orbit above an uninhabited world. Kirk leads a landing party to the surface to investigate any possible connection between the planet and the disturbance, and they find a man named Lazarus, who, though he seems healthy and normal, claims to be fighting his own equivalent from a universe of antimatter. Lazarus proves to be a threat to the Enterprise's security, and the increasing blasts of turbulence seem to confirm Lazarus's story that he has a powerful enemy in another dimension.
 

March 2267    Tomorrow is Yesterday

Stardate 3113.2: Accidentally swinging around the sun into a time warp, the Enterprise's crew recover from their turbulent journey and find themselves in Earth's atmosphere in the 1960s over North America. Jets are dispatched to bring the "UFO" down, and one is caught in the ship's tractor beam and begins to break apart. The pilot, Captain John Christopher, is beamed out of his plane before it disintegrates and is welcomed to the Enterprise as the crew prepares to return to the 23rd century. Kirk tells Christopher that he cannot be returned to his own time because he has seen too much of the future, but Spock discovers that Christopher will have a son who will be very important to the history of the space program and Christopher must be returned to 20th century Earth.

March 2267    Return of the Archons, The

Stardate 3156.2: Sulu and another crewman are investigating a primitive but ancient-Earth-like alien culture incognito, but their disguise is blown and they're running for their lives. The Enterprise can't beam Sulu up in time, and he is hit by a weapon on the planet which leaves him under the control of something or someone called Landru. Kirk and Spock beam down, finding the planet's people engaged in unusual rituals, and also finding out from some of the locals that Landru has complete control over most everyone on the planet, aside from a small resistance effort. What begins as an effort to free the people on the planet becomes a matter of survival when Kirk and Spock become hunted by Landru's "puppets."

March 2267    Taste of Armageddon, A
 

Stardate 3192.1: The Enterprise visits the twin planets of Eminiar VII and Vendikar so Ambassador Fox may approach their governments about joining the Federation. When they beam down to Eminiar 7, Kirk, Spock and the rest of their landing party are informed that the Enterprise has been struck by enemy missiles and Kirk's party, along with the rest of the crew, have been declared casualties. Investigating further, Kirk discovers that the war between the two planets is controlled by computers, which determine the damage done and the fatalities caused by the attacks, and assigns citizens to report to disintegration machines, which they do willingly. Kirk is trapped on the planet, but Ambassador Fox thinks he can remedy the situation and beams down unarmed against Scotty's advice.

March 2267    Space Seed

Stardate 3141.9: The Enterprise discovers a derelict vessel which turns out to be an Earth ship dating back to a series of wars in the 1990s in which Earth's population was threatened by a group of genetically engineered superhuman beings. The inhabitants of the rogue ship, though they try to conceal the fact at every opportunity, are the only surviving oppressors from that war. Their leader, Khan, wishes to resume their reign of terror, beginning with a takeover of the Enterprise.
 

April 2267        This Side of Paradise

Stardate 3417.3: Investigating a colony whose settlers should be, but for some reason are not, threatened by radiation, Kirk and a landing party beam down to investigate. McCoy diagnoses the colonists as being in fine health and none of them wish to leave, no matter how much danger they are in. Spock, with Leila, an old acquaintance who has a crush on him, is infested by spores from a plant while examining the colony grounds. McCoy also soon falls victims to the spores, which leave their victims - even Spock - in a stupor with no desire to leave...and Kirk is left with a ship and no crew.

April 2267    Devil in the Dark, The
 

Stardate 3196.1: A mining colony reports a number of mysterious deaths just after they successfully dig to a lower level of a planetoid believed to be uninhabited. The Enterprise arrives, and Kirk, Spock and security officers from the ship begin a hunt for whoever or whatever is responsible for the growing body count. An amorphous creature capable of burning through the indigenous rock is found to be the cause of the deaths as well as a very well-thought out sabotage of the miners' life support systems. Through a mind-meld, Spock communicates with the being - known as the Horta - and finds that it is the last of its kind, a mother laying eggs in the tunnels and caves it builds for itself. But the humans have been discovering and destroying the eggs, and if the Horta cannot bring herself to negotiate with the miners, one party or the other faces extinction.

April 2267         Errand of Mercy

Stardate 3198.4: A sudden attack by the Klingons on a vulnerable neutral sector - a location of great strategic importance - puts the Enterprise on red alert, as the threat of a catastrophic war between the Klingon Empire and the Federation looms. Kirk and Spock beam down to Organia, the planet whose security is at risk due to the Klingon threat, and find that the inhabitants, who appear to be humans who have reached the medieval period of sociological and technological development, are not at all concerned that their world is currently being overrun by Klingon troops. Kirk and Spock try to conceal their identities, but fail, leaving Kirk and Klingon Captain Kor at each others' throats - until the Organians reveal their true nature and intervene in the impending war.

April  2267     City on the Edge of Forever, The
 

Stardate 3134.0: McCoy accidentally receives an overdose of cordrazine as the Enterprise encounters turbulence. He beams down to an unexplored world where he enters a time-travel device known as the Guardian of Forever and changes history in the 1930s. Kirk and Spock also return to the 30s, where Kirk falls in love with peace activist Edith Keeler. When McCoy is finally located, Kirk must allow history to run its course, resulting in Edith's death, or he will leave history altered irrevocably, with no chance of returning to the future or the Enterprise.

April 2267    Operation: Annihilate!

Stardate 3287.2: The Enterprise witnesses a smaller ship diving into the sun of Deneva under the control of a pilot who seems to have intentionally killed himself. This confirms Kirk's worst fears, that a seemingly contagious outbreak of insanity on several other worlds has spread to Deneva, where his brother lives. On the surface, many are found to be dead - including Kirk's brother - and an unknown species of alien parasite is found to be responsible. In trying to gather data on them, Spock is attacked and taken over by one, and, like the people of Deneva and several other planets, starts to go mad. Spock's condition also presents McCoy with the first opportunity to learn more about both the creature and its victim, and Spock may have to die if the crew is to learn any more about the creatures to prevent them from spreading further into human territory.

Late April 2267- April 2268

Events of the second year of the original Star Trek series (1967-1968 season), the second year of the Enterprise's five year mission.

May 2267            Catspaw                

Stardate 3018.2

When a crewman from a landing party investigating the latest planet visited by the Enterprise returns under some form of exterior control and then dies, Kirk decides to beam down and see for himself what caused the death. What Kirk, Spock and McCoy find on the surface is a house of horrors right out of ancient Earth mythology, right down to three hideous witches delivering a prophecy of doom for the crew. Two aliens are found to be at the heart of the evil activities, and they have no intention of letting Kirk or the Enterprise leave their world...

May 2267        Metamorphosis             Stardate unknown   

Taking Federation Commissioner Hedford back to the Enterprise's sick bay so McCoy can treat her for a potentially dangerous but curable ailment, the shuttlecraft containing Kirk, Spock, McCoy and Hedford is diverted by a strange energy field to a barren planet, inhabited only by Cochrane, who invented the basis for current warp engine technology decades ago and should be dead by now. Cochrane reveals, however, that an energy creature called the Companion has halted his aging process. The Companion is also concerned about Cochrane's psychological well-being, and Kirk and the others have been brought to keep Cochrane company - possibly for the rest of their lives.

May 2267        Friday’s Child     

Stardate 3497.2

The Enterprise rushes to an underdeveloped planet in an attempt to stop Klingon intervention in the somewhat primitive society. The Klingon Krag is trying to convince the planet's people that an alliance with the Klingon Empire would be beneficial, and when Kirk breaks cultural taboos - not to mention the prime directive - by interfering with a "routine" killing and saving a pregnant woman, it becomes all too easy for Krag to point out that the landing party from the Enterprise have only come to usurp the planet's ways of life.

June 2267    Who Mourns for Adonais?

Stardate 3468.1

The Enterprise is trapped in deep space by an enormous hand. Kirk and a landing party beam down to a nearby planet and find that a powerful being claiming to be the Greek god Apollo is the one responsible for holding the Enterprise in its place - and Kirk discovers that Apollo's ability to immobilize a starship is just a small demonstration of the being's power. When Apollo demands that the crew worship him, Kirk decides that the mythical figure must be defeated - but must rely on playing with Apollo's emotions and weaknesses since the being can tamper with the Enterprise's technology.

June 2267        Amok Time            

Stardate 3372.7

Spock begins acting strange - even violent - as, unknown to the rest of the crew, he enters the Vulcan mating phase that strikes adult male Vulcans every seven years. Kirk must divert the Enterprise from a tight schedule to return Spock to Vulcan so his mating ritual may be carried out. But on arriving, it is discovered that Spock must compete with a gladiator of his prospective mate's choice - and that turns out, on the spur of the moment, to be Kirk.

July 2267        

The Doomsday Machine            

Stardate 4202.9

The starship Constellation is found in deep space, almost completely destroyed. The only person found aboard is Commodore Matt Decker, in a state of shock and only able to give minimal details of what happened. A gigantic ship/creature suddenly returns, well over ten times the size of the Federation vessels, capable of literally eating entire planets to replenish is colossal energy needs. Kirk is trapped on the unarmed Constellation, while Decker takes command of the Enterprise and plans to exact revenge on the huge alien vessel, no matter what the risk to Kirk's ship and crew.

July 2267        A Wolf in the Fold

Stardate 3614.9

After suffering a head injury on the Enterprise, Scotty is talking into shore leave with Kirk and McCoy. On the planet they are visiting, however, a series of grisly murders of local women begins, and all the evidence seems to point to Scotty. Kirk must contend with the overwhelming evidence against Scotty as well as the overzealous local constable, who is ready to have Scotty punished as soon as possible.

August 2267        Changeling, The

Stardate 3451.9

The Enterprise is attacked and boarded by the unusual space probe Nomad, which Spock identifies as the combined remains of an alien robot and an Earth exploration probe. Nomad's purpose - a confused mix of aliens' orders and instructions from Earth - is to seek out and sterilize all impurities, including imperfect beings like humans. The only thing preventing Nomad from obliterating the Enterprise and everyone on board is the similarity between the name of Nomad's creator and Captain Kirk, and Kirk must try to play that role as best he can while figuring out how to get rid of Nomad.

August 2267        The Apple                

Stardate 3715.0

An Enterprise landing party beams down to an paradisical planet, where Kirk discovers that the people living there are still primitive, all progress held in check by an enormous ancient computer known as Vaal, which also demands sacrifices of food by the natives. Vaal detects the Enterprise in orbit and begins to drain it of its power, and Kirk realizes that he will have to destroy Vaal to save the Enterprise, but the surface dwellers' lifestyles will be changed forever if Vaal is removed.

September 2267        Mirror, Mirror        

Stardate unknown

Returning to the Enterprise from an unsuccessful mission to ask the leaders of a planet for a possible mineral trade, Kirk, Uhura, Scotty and McCoy are being beamed up just as a freak accident hurls them into another reality, which still contains a USS Enterprise and a Spock and a Federation, but the other reality's versions are cruel and inhumane - the crew the alternate Enterprise is readying for a strike against the planet Kirk just left to take their mineral resources by force. Kirk and his landing party must try to cover their inexplicable identities and try to fit in, while stopping the savage alternate Enterprise from carrying its reign of terror any further.

September 2267        Deadly Years, The  

Stardate 3478.2

Conducting a survey of a planet, a landing party from the Enterprise is contaminated with a form of radiation sickness that accelerates aging. With the ship's entire command crew rapidly aging and slowly losing their ability to perform their routine duties, Commodore Stocker, who is aboard for a trip to his next starbase command, decides he must question their competency and take the captain's chair as Kirk, Spock and the others face an impending death of old age.

October 2267        I, Mudd      

Stardate 4513.3

The Enterprise is taken over by Crewman Norman, who turns out to be an android in disguise. He sets the ship on a course back to his home world, a planet populated entirely by androids - and one Harry Mudd, trapped there after a crash-landing. The androids plan to move out beyond their own planet to populate the galaxy with more of their logical, efficient kind, and the Enterprise is their chosen means of transport. Kirk, although understandably suspicious of Harry, must now cooperate with the con-man if the android invasion is to be stopped. And the greatest weapon at the disposal of Kirk, his crew, and Harry is total illogic.

October 2267    The Trouble with Tribbles, The          Stardate 4523.3

The Enterprise is summoned to space station K-7 for security duty when the station's security forces are considered inadequate to guard a shipment of valuable grain by the standards of Federation agriculture administrator Baris. A shipload of Klingons stops off at the station as well, which has all parties concerned even more about the grain consignment. Kirk orders stepped-up security, but that only results in some of the crew - including Scotty and Chekov - instigating a massive bar brawl with the Klingons. All the while, the seemingly harmless huckster Cyrano Jones is trying to peddle furry tribbles off to anyone with a few credits, and Uhura buys one and takes it back to the Enterprise, not knowing that tribbles do only two things: eat and breed.

(Also, events of Trials and Tribble-ations)

November 2267        Bread and Circuses 

Stardate 4040.7

Trying to track down the crew of the downed Federation starship Beagle, Kirk, Spock and McCoy arrive on a planet populated by a society that mixes savage ancient practices with 20th century technology. Enemies of the Roman Empire-like state are rounded up and forced to participate in televised coliseum battles. Kirk and Spock briefly encounter a peaceful group of people, but all are captured and prepared for their duels - including one event which will pit Spock against McCoy. Kirk must hope that he and his landing party can survive long enough for help to arrive from the Enterprise.

November 2267        Journey to Babel           

Stardate 3842.3

Delegates from several worlds are welcomed aboard for a trip to Babel where a Federation summit will take place, among them Vulcan Ambassador Sarek - Spock's father, from whom he has been alienated since childhood. Spock's human mother, Amanda, can't stop trying to bridge the gap between her husband and son, while Spock and Sarek can't seem to do anything but continue their rivalry. 

At the Babel Conference, Ambassador Sarek manages to broker an agreement to admit Coridan to the United Federation of Planets.   Prior to the conference, the journey of the ambassadors to Babel, aboard the starship Enterprise, was complicated by an Orion plot to assassinate the Tellarite ambassador with agents disguised as Andorians.  "Journey to Babel" (TOS), 100 years prior to "Sarek" (TNG).

December 2267        

A Private Little War            

Stardate 4211.4

The Enterprise visits a primitive world where the Klingon Empire has armed one faction of people against another in hopes of eliminating the weaker population and allying the stronger warriors with the Klingons. Spock is seriously injured when he, Kirk and McCoy beam down, and is returned to the Enterprise for treatment as Kirk and McCoy try to make contact with the locals. Kirk is injured by an poisonous indigenous animal, but reaches, with McCoy's help, his old friend Tyree. Tyree's mystical wife Nona cures Kirk and then pursues him. Kirk and McCoy, in the meantime, may only be able to resolve the unfair advantage between the planet's two factions by arming Tyree against his people's Klingon-backed adversaries.
 

December 2267       

The Gamesters of Triskelion        

Stardate 3211.7

A landing party beaming down to the Enterprise's latest stop is intercepted by a more powerful, long-range transporter beam, which hijacks Kirk, Uhura and Chekov to the planet Triskelion, where they are immediately handed over to various "trainers" to prepare them for their upcoming duties as gladiators to amuse the powerful rulers of the planet. Spock orders the Enterprise to warp to Triskelion to save the landing party but doesn't realize that the powers-that-be on the planet may want to lure the Enterprise crew there to provide them with even more entertainment.

December 2267            Obsession            

Stardate 3619.2

While a landing party is conducting a routine survey of a planet, two crewman are killed and one badly injured by a cloudlike being Kirk suddenly believes he has encountered before. It turns out that the creature attacked a ship that Kirk had been stationed on years before and killed most of the crew, and Kirk feels that he should have been able to do more to save his former crewmates. He transfers that guilt to the surviving landing party member, who not only is considered responsible by Kirk, but is also the son of Kirk's former captain on that previous assignment. Kirk orders the Enterprise to follow the creature through space, determined to kill it - at any cost - before it can take more lives.

January 2268         The Immunity Syndrome 

Stardate 4307.1

Spock telepathically receives the collective death cries of the entire all-Vulcan crew of the USS Intrepid, which has just been destroyed by an unknown force. The Enterprise intercepts a gigantic organism, which then surrounds the ship, beginning to cause physical and mental illness among the crew. Kirk, Spock and McCoy surmise that this paradoxically huge single-celled organism may be a "disease," as its course will soon take it through inhabited star systems. The Enterprise may turn out to be the only "antibody" capable of saving millions from the onslaught of the enormous parasite.

January 2268        

A Piece of the Action            

Stardate 4598.0

The Enterprise encounters a planet recently visited by another starship and discovers that a book on the Chicago mobs of the 1920s accidentally left behind by a crew member of the previous ship has become the basis of the planet's society structure over 200 years of the planet's time (the starship having had warp drive). The intelligent but imitative inhabitants show a keen interest in replacing telephones with communicators and replacing tommy guns with phasers when Kirk, Spock and McCoy - along with their standard Starfleet landing party equipment - are captured.

February 2268        By Any Other Name  

Stardate 4657.5

The Enterprise responds to a distress call, finding only a trap set by a small group of aliens from the Andromeda galaxy who are assessing the potential of the Federation's home galaxy for colonization. The aliens successfully take over the ship, reducing all aboard except for Kirk, Spock, McCoy and Scotty to dehydrated cubes so the ship's supply of food and oxygen can be used by the hijackers and Kirk's command crew for the staggering 300-year return to Andromeda. The aliens, having assumed human form, also gain attributes such as emotions, which may be just the weakness Kirk and the others need to attack to regain control of the Enterprise.

February 2268        Return to Tomorrow

Stardate 4768.3

The Enterprise visits a planet long thought uninhabited, and finds globes that contain the consciousness of the last survivors of the planet, Sargon, Thalassa and Henoch. The three remaining beings wish to "possess" the bodies of willing Enterprise crew members, leaving the crew members' minds in the globes briefly as Sargon and his companions use the human bodies to construct android bodies for their minds. Kirk, Spock, and Dr. Mulhall agree to this procedure, but Henoch, occupying Spock's body, has other plans than building an android frame for himself. In the meantime, Sargon and Thalassa, in the bodies of Kirk and Mulhall, fall in love all over again. One way or another, though, the humans' bodies must be vacated since their metabolism is incapable of withstanding the levels of activity taken on by Sargon and the others.

March 2268            Patterns of Force

Stardate 2534.0

On arrival at Ekos, the Enterprise is the target of a nuclear missile attack, a technology which didn't exist the last time a Federation ship visited the planet. Kirk and Spock beam down to investigate, discovering that the government on Ekos has been transformed into a Nazi police state which came about when Federation teacher John Gill tried to simply increase the efficiency of the government on Ekos. Gill is now under the control of the people he has tried to educate, and anyone who tries to reveal the truth about Gill or rescue him - including Kirk and Spock - are hunted men.

March 2268            

The Ultimate Computer            

Stardate 4729.4

Kirk is ordered to relinquish command of the Enterprise to Dr. Daystrom's new M-5 computer, which, according to Daystrom, can make all the decisions that a starship captain would encounter correctly and more quickly than any human. The Enterprise, with Kirk and a few others aboard, is engaged in Starfleet wargames, but the M-5 begins to treat the other ships as a serious threat and retaliates with full salvos of phasers and photon torpedoes, destroying one ship. Believing Kirk may have lost his mind, Starfleet gives the remaining ships permission to destroy the Enterprise.

April 2268           The Omega Glory     

Stardate unknown

The missing starship Exeter is spotted in orbit of an inhabited planet. Kirk, Spock and McCoy board the Exeter, finding only the remains of the crew, wiped out by a disease which likely affects the boarding party now. Transporting to the planet, Kirk finds that Captain Tracey of the Exeter escaped his crew's fate, and the atmosphere on the planet is capable of eliminating the disease from the Enterprise landing party's bloodstreams. But more problems arise as Tracey discards his loyalty to the prime directive in an attempt to gain power in the planet's government.

April 2268          Assignment: Earth            

Stardate unknown

After warping back in time to the late 20th century for a glimpse of Earth's past, the Enterprise intercepts a mysterious man who simply calls himself Gary Seven. Although Gary and his ever-present black cat Isis appear like inhabitants of the 20th century, Gary knows what kind of ship he is on and recognizes Spock as a Vulcan, and ascertains that the Enterprise is from the 23rd century. Gary Seven evades security officers and resumes his journey to Earth. Kirk and Spock assume 20th century disguises and pursue him, finding that Gary is a time traveler from the future who is here to influence Earth's history - but whether or not his influence will be benign is another question altogether.

(note: the entire episode takes place in 1968, but the time that the time travel trip - not shown - happened was at this point in the timeline)