Star Trek: Season 1, Episode 29

Operation -- Annihilate! (13 Apr. 1967)

TV Episode  -   -  Action | Adventure | Sci-Fi
Your rating:
    1 2 3 4 5 6 7 8 9 10 -/10 X  
Ratings: 7.6/10 from 821 users  
Reviews: 10 user | 7 critic

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



, (created by)
0Check in

User Lists

Related lists from IMDb users

a list of 36 titles
created 22 Oct 2011
a list of 23 titles
created 10 Apr 2012
a list of 30 titles
created 19 Aug 2012
a list of 49 titles
created 22 Jan 2013
a list of 44 titles
created 03 Jun 2013

Related Items

Connect with IMDb

Share this Rating

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

Operation -- Annihilate! (13 Apr 1967) on IMDb 7.6/10

Want to share IMDb's rating on your own site? Use the HTML below.

Take The Quiz!

Test your knowledge of Star Trek.
« Previous Episode | 30 of 80 Episodes | Next Episode »




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


See all certifications »


Official Sites:



Release Date:

13 April 1967 (USA)  »

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
See  »

Did You Know?


There is an outtake on the Star Trek Blooper Reel showing the alien parasite attaching itself to Spock's buttocks by mistake. See more »


(at around 10 mins) There is a person moving in and out of the frame way behind the action during the outdoor sequence. See more »


Capt. Kirk: Anything, Lieutenant?
Uhura: No, sir. I've tried every major transmitting station on Deneva. None of them have acknowledged my contact signal.
Capt. Kirk: Try GSK-783, subspace frequency 3.
Uhura: But, sir, that's a call sign for a private transmitter.
Capt. Kirk: I'm very well aware of that, Lieutenant. Try it.
See more »


Spoofed in Buffy the Vampire Slayer: Bad Eggs (1998) See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Pretty Pedestrian Effort
28 April 2014 | by (United States) – See all my reviews

We sadly learn of the death of Kirk's brother, wife, and son. They have been victimized by an influx of rubbery creatures that latch on to their victims and do in their central nervous systems. Kirk vows to find a solution to this problem. Spock is investigating the things but fails to check out his surroundings. As he walks under an archway, one of the creatures, previously stuck to a wall, flies through the air and settles on his back. He is immediately overcome with excruciating pain. The crew is able to stun one of the creatures and it is brought to Dr. McCoy for analysis. McCoy tries every kind of approach he can think of from poisons to heat to shooting and stabbing but nothing works. It is when they realize that one of the victims said as he approached the sun that he was free that they try one last thing: light. The remainder of the episode involves their efforts to test their light theory, being stopped short because to do this, you need a host that has been assaulted by this creature. It is the quest for such a host and more tests that make the conclusion quite interesting.

0 of 0 people found this review helpful.  Was this review helpful to you?

Message Boards

Recent Posts
Was it a Mistake..? waddah-j
Guest Stars who should have been CAST MEMBERS of Star Trek.............. BLACKsoapFan
Name The Things... powersroc
What would you have liked to see in Season 4? newdickmorris
I'm watching 'That Which Survives,' michaelward15
The worst STAR TREK episode david-h-downing
Discuss Operation -- Annihilate! (1967) on the IMDb message boards »

Contribute to This Page

Create a character page for: