• THE GODS TOOK HIS BEST FRIEND.
  (Gilgamesh throws a dagger into Iolaus' chest.)
  NOW, HERCULES WANTS HIM BACK FROM THE DEAD.
  (Hercules strikes a zombie with a torch, and the zombie disentagrates into dust.)
  (Iolaus' hand reaches up from a pit.)
  (Hercules punches a Sumerian clay tablet.)
  (Dumuzi surrounded by ghosts.)
  AN ALL NEW--
  (Nebula jumps into the air.)
  (Hercules punches Dumuzi.)
  (Two mirrors explode behind Dumuzi.)
  (Hercules, kneeling on the ground, raises his arms.)
  Hercules: Iolaus!
  HERCULES!
• ON AN ALL NEW HERCULES--
  (Gilgamesh throws a dagger into Iolaus' chest.)
  AN EVIL GOD HAS CLAIMED HIS BEST FRIEND.
  (Hercules touches the dead Iolaus' forehead.)
  Nebula: You just can't walk into the underworld and take him back from the dead.
  Hercules: Watch me.
  (Hercules strikes a zombie with a torch, and the zombie disentagrates into dust.)
  (Iolaus' reaches up from a pit.)
  (Nebula kicks a zombie in the head.)
  (Hercules lifts up a boulder and throws it.)
  (Hercules punches a Sumerian clay tablet.)
  (Nebula jumps into the air.)
  (Hercules holds Nebula at knifepoint.)
  (Hercules goes flying from an explosion.)
  (Hercules punches Dumuzi.)
  (Two mirrors explode behind Dumuzi.)
  (Hercules, kneeling on the ground, raises his arms.)
  Hercules: Iolaus!
  AN ALL NEW HERCULES!

"Faith", "Descent", and "Resurrection" may have been a three story arc, but in this case, it was like A, B, and C, but B isn't really necessary. Only two things needed to be known: that Hercules at first denied Iolaus' death, and then blamed himself for it. Knowing Herc killed Dumuzi to free the souls Dumuzi had captured added another labor to Hercules' legend, but it didn't advance the storyline ahead. The end scenes led into "Resurrection".

Hercules: Notice the pain he's in when Dumuzi tells him his search for Iolaus was in vain. This statement destroyed what was left of Hercules' self-confidence; it also led to Dumuzi's demise, too.

Nebula: Radical change from a good Sumerian Queen to a soulless evil zombie. She tries to destroy Herc, but Hercules gets the best of her, of course.

About the zombies: I think Robert Tapert and Sam Raimi have been looking at their The Evil Dead Trilogy and borrowing some stuff off it just lately.