The Doomsday Machine (Star Trek: The Original Series)

"The Doomsday Machine"
Star Trek: The Original Series episode
The USS Constellation enters the Doomsday Machine.
Episode no.	Season 2 Episode 6
Directed by	Marc Daniels
Written by	Norman Spinrad
Featured music	Sol Kaplan
Cinematography by	Jerry Finnerman
Production code	035
Original air date	October 20, 1967 (1967-10-20)
Guest appearances
William Windom—Commodore Matt Decker Elizabeth Rogers—Lt. Palmer John Copage—Elliot Eddie Paskey—Lt. Leslie William Blackburn—Lt. Hadley Richard Compton—Washburn Tim Burns—Russ Jerry Catron—Montgomery John Winston—Lt. Kyle
Episode chronology
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Star Trek: The Original Series season 2
List of episodes

"The Doomsday Machine" is the sixth episode of the second season of the American science fiction television series Star Trek. Written by Norman Spinrad and directed by Marc Daniels, it was first broadcast on October 20, 1967.

In the episode, the starship Enterprise fights a powerful planet-killing machine from another galaxy.