Star Trek: Season 1, Episode 29

Operation -- Annihilate! (13 Apr. 1967)

TV Episode  -   -  Action | Adventure | Sci-Fi
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Ratings: 7.6/10 from 866 users  
Reviews: 12 user | 9 critic

The Enterprise crew attempts to stop a plague of amoeba-like creatures from possessing human hosts and spreading throughout the galaxy.



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Title: Operation -- Annihilate! (13 Apr 1967)

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Episode complete credited cast:
Joan Swift ...
Maurishka ...
Peter Kirk (as Craig Hundley)
Fred Carson ...
First Denevan
Jerry Catron ...
Second Denevan


The Enterprise traces a virus-like outbreak that seems to be traveling in a direct line across a planetary system. The next planet is home to Kirk's brother Sam, his sister-in-law and their young son. The Enterprise arrives too late however for Sam. They find flying jellyfish-like creatures that attach themselves to humans. They take over the victims nervous system forcing them to bend to their will. Spock finds a weapon to use against the creatures but it leaves him hopelessly blind. Written by garykmcd

Plot Summary | Plot Synopsis


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Release Date:

13 April 1967 (USA)  »

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


The parasites bear a strong resemblance to the titular enemies from the 1951 Robert A. Heinlein novel The Puppet Masters, sometimes considered to have started the "body snatchers" sub genre of science fiction. The same story was the unofficial basis for The Brain Eaters (1958) which also starred Leonard Nimoy. See also Star Trek: Charlie X (1966) and Star Trek: The Trouble with Tribbles (1967), additional Star Trek The Original Series episodes with Heinlein resemblances. See more »


After the Enterprise crew established a zero-tolerance viral quarantine protocol in Star Trek: Miri, their lack of concern about bringing the infected Denevan colonists onto the ship is a bit odd. See more »


Scott: Freeze right there, Mr. Spock, or I'll put ya to sleep for sure.
See more »


Referenced in Free Enterprise (1998) See more »

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User Reviews

Set location: TRW in Redondo Beach,CA
24 June 2006 | by (United States) – See all my reviews

User commentator a_l_i_e_n from Canada does great job of summarizing plot of this episode.

Of interest to me is his comment "The futuristic architecture of the Denovan capital for example is a fine example of the show's use of outdoor locations. The art direction here is vivid, well constructed and definitely a cut above the usually unconvincing indoor sets they so often had to make due with."

In fact the location of this episode's set was the old TRW Defense and Space Systems Group campus in Redondo Beach, CA at Avaiation Blvd and Marine Ave (also adjacent, and just N. of old Redondo HS campus) where I used to work in the late 70s. It was called Space Park or Research Park (address was 1 Space Park, RB, CA) back then. The flight of concrete stairs they come down at beginning of episode was the path to the cafeteria/lecture presentation area. Rest of set (where creatures were stuck to walls and ceiling) was in a typical indoor waiting area in most any of the many architecturally stylish buildings on that campus.

14 of 16 people found this review helpful.  Was this review helpful to you?

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