Star Trek: Season 2, Episode 3

The Changeling (29 Sep. 1967)

TV Episode  |   |  Action, Adventure, Mystery
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Ratings: 7.8/10 from 980 users  
Reviews: 13 user | 8 critic

A powerful artificially intelligent Earth probe, with a murderously twisted imperative, comes aboard the Enterprise and confuses Capt. Kirk as his creator.



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Title: The Changeling (29 Sep 1967)

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Episode complete credited cast:
Makee K. Blaisdell ...
Singh (as Blaisdel Makee)
Barbara Gates ...
Meade Martin ...
Arnold Lessing ...
Security Guard
Vic Perrin ...
Nomad's Voice (voice)


The Enterprise encounters a powerful energy force that has apparently killed all human life in a solar system with over one billion inhabitants. They identify the culprit as a small space probe that had its origins on Earth. Called Nomad, it merged with another and, as a result, took on a new mission to destroy all biological beings as being imperfect. It believes Captain Kirk to be its creator and, as such, has spared the Enterprise and its crew, at least temporarily. Written by garykmcd

Plot Summary | Plot Synopsis


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Release Date:

29 September 1967 (USA)  »

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Aspect Ratio:

1.33 : 1
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Did You Know?


In this episode, Lt. Leslie appears at navigation but he is inexplicably wearing a gold tunic instead of his usual red uniform shirt. See more »


When Nomad is supposedly emerging from sickbay after attacking Chapel to see Kirk's records, he is instead seen emerging from the Turbolift. See more »


Sulu: [the Enterprise is under attack from an unknown enemy] Sir, they've fired another!
Capt. Kirk: Can we take it, Mister Scott?
Scott: That's... problematical, sir.
See more »


Spoofed in Futurama: In-A-Gadda-Da-Leela (2010) See more »

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User Reviews

I Am Somad!
28 April 2014 | by (United States) – See all my reviews

I know a writer takes his characters, their history, and then manufactures some kind of threat. It's sort of sitcom without the com. In this episode, a wandering probe that was to be used for benevolent purposes has collided with another device and its mission has changed. It is called "Nomad" because it travels from place to place. Unfortunately, it destroys anything with imperfections; that includes even modest things. In a ridiculous move, it finds Uhura to be imperfect and wipes her memory clean. She is put back in kindergarten. Does anyone see how stupid this is? Even if she is retrained, she has no experiences or data to do her job. Others are killed when they confront the thing. The only salvation is that the thing has mistaken Kirk for the creator of the device. It moves around the ship like an efficiency expert in the sixties (although the worst that could happen then was you got fired). As time goes along, the probe starts to put two and two together and Kirk's control of it begins to wane. Spock is able to figure out its skewed mission by doing the old mind meld. So what to do. The conclusion has to do with logic. Spock's kind of logic.

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