Star Trek
Obsession
Season 2, Episode 13 · Aired 1967-12-15

Synopsis
On an obscure planet, Kirk smells something that reminds him of the past. And then two crewman die, their ghastly pallor betraying the fact that every red blood cell in their bodies has been destroyed, the hemoglobin neatly removed. A long time ago, very far from here, Kirk was a young Lieutenant about the Farragut when that ship encountered the cause: a mysterious, gaseous cloud that feeds on blood. Now, Kirk is obsessed with destroying the monster that killed his then mentor, the Farragut's captain Garrovik. Perhaps to an unhealthy degree. Or, given what Spock discovers, perhaps not.
In the series
This episode is part of Star Trek (1966–1969) on NBC.
A cancelled space opera that refused to die — fandom's founding text.
Key cast
- William Shatner as Capt. James T. Kirk
- Leonard Nimoy as Spock
- DeForest Kelley as Dr. Leonard McCoy
- Nichelle Nichols as Uhura
- James Doohan as Scotty