WRITER:      John D.F. Black

DIRECTOR:    Marc Daniels

PRINCIPALS:  Kirk      Chapel

             Spock     Dr. Harrison

             McCoy     Lieutenant Kevin Riley

             Scott     Joe Tormolen

             Sulu      Lieutenant Brent

             Uhura

     sent to pick up a research team, the 
Enterprise finds the scientists dead.  One of the
landing party brings the disease back to the 
crew, forcing suppressed emotions to the surface.
Sulu becomes a modern day D'Artagnan.  Lt. Kevin 
Riley shuts down the engines,  Spock and Kirk are
also affected, in one of the series most powerful
scenes, they help each other overcome their inner
fears. Kirk races against time before the ship is
pulled into the disintegrating planet.


Airdate:  September 29, 1966