Star Trek: Season 2, Episode 6

The Doomsday Machine (20 Oct. 1967)

TV Episode  -   -  Action | Adventure | Sci-Fi
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Ratings: 8.9/10 from 1,077 users  
Reviews: 24 user | 6 critic

The USS Enterprise encounters the wrecked USS Constellation and its distraught captain who's determined to stop the giant planet-destroying robot ship that killed his crew.



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Title: The Doomsday Machine (20 Oct 1967)

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Episode complete credited cast:
Elizabeth Rogers ...
John Winston ...
Richard Compton ...
Lt. Washburn
John Copage ...
Tim Burns ...
Jerry Catron ...


The U.S.S. Constellation and its crew were destroyed by a giant robot ship which consumes planets for fuel, leaving only a guilt-ridden Commodore Decker aboard the crippled ship. Kirk beams over to begin repairs while Decker beams aboard the Enterprise. After Kirk loses radio contact with the Enterprise, the obsessed Commodore seizes command of the starship, determined to destroy the planet-killer, even at the cost of Kirk's ship and the entire crew. Written by

Plot Summary | Plot Synopsis


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Release Date:

20 October 1967 (USA)  »

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


James Doohan's favorite episode for its highlighting of the engineering aspects of the Star Trek (1966) world. See more »


When Mr. Scott beams over to the Constellation, he wears a kit of some kind that is held by a diagonal strap over his right shoulder. The strap is visible just before the Constellation gets underway, but after the ship starts to move, Scott is not wearing the strap as he is thrown off balance and clings to machinery and the hexagonal grid behind him. Then the ship's ride smooths out, and after a cutaway to Captain Kirk, Scott is suddenly wearing the strap over his shoulder again. See more »


Capt. Kirk: If I only had some phasers.
Scott: Phasers - you've got 'em. I have one bank recharged.
Capt. Kirk: Scotty, you just earned your pay for the week.
See more »


Referenced in Star Trek New Voyages: Phase II: In Harms Way (2004) See more »

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User Reviews

Great to see updated version in HD
11 February 2007 | by (Vancouver, Canada) – See all my reviews

"The Doomsday Machine" was always in my all-time top 10 list of original Trek episodes; just saw it again for the first time in several years -- luckily in HD. I first saw this episode as an 8-year old kid during the original NBC run and was just blown away. Even after sitting through the horribly "edited", after-school rerun version of this show many, many times, it still kicked ass! William Windom was great as the haggard, broken Commodore Decker and "The Doomsday Machine" has all the elements of the best Trek episodes: tight script, thinly-disguised references to 60's politics, self-sacrifice for the greater good, tactical improvisation under pressure, victory-snatched-from-jaws-of-defeat etc. etc. It just gets better with age! Hats off to all who participated in bringing this series back with updated FX - it looks great (new prints??). I'm sure it's close to what Gene Roddenberry might have done with the show way back in the day if he had access to all the modern CG bells and whistles...

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