Obsession

Obsession was an episode of the Star Trek: The Original Series.
A survey course brings the Enterprise crew in conflict with an intelligent, if misunderstood, vampiric cloud that killed a crew Kirk was on years ago, fathered by the captain of a ship currently assigned to an ensign who is the son of the captain Kirk worshipped. 
==References==
USS Farragut Antimatter
Category:TOS episodes
Category:Episodes