Star Trek (1966–1969)
21 user 6 critic

The Changeling 

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


Marc Daniels


Gene Roddenberry (created by), John Meredyth Lucas

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Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
DeForest Kelley ... Dr. McCoy
James Doohan ... Scott
Nichelle Nichols ... Uhura
George Takei ... Sulu
Majel Barrett ... Christine Chapel
Makee K. Blaisdell Makee K. Blaisdell ... Singh (as Blaisdel Makee)
Barbara Gates Barbara Gates ... Crewwoman
Meade Martin Meade Martin ... Crewman
Arnold Lessing Arnold Lessing ... Security Guard
Vic Perrin Vic Perrin ... Nomad (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


TV-PG | See all certifications »


Official Sites:

Official site




English | Swahili

Release Date:

29 September 1967 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

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Did You Know?


Per Irish mythology, a "changeling" is a demon child substituted by the spirits for a human child they have stolen. That is the context used here. However, the word can also mean a shape shifter, as in several other contexts within the Trek Universe. The most famous shape shifter changeling in Trek was the regular character Odo from Star Trek: Deep Space Nine (1993). See more »


When Spock, Kirk and McCoy view a diagram that shows the various parts of the NOMAD probe, the lower right of the diagram contains the annotation: "Computer Data Banks Recall & Transmition," should read "Transmission". See more »


[outtake from a scene shortly before beaming Nomad aboard the ship]
Capt. Kirk: We are prepared to beam you aboard.
Scott: Captain... you forgot all about the environment and all that stuff. Do you wanna really do that?
[everyone bursts out laughing]
See more »


Referenced in Team Knight Rider: Apocalypse Maybe (1998) See more »

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User Reviews

blood born does not act that swiftly..
21 March 2018 | by merelyaninnuendoSee all my reviews

Star Trek

The Changeling

A cultural hub and by far one of the most loved and respected tale, Star Trek is created by Gene Roddenberry who wrote this brilliant concept, ahead of its time and is probably why it still doesn't fail to entertain us after these many years. It was written "for the future" in many aspects as it even though is smarter, wiser and powerful it still seeks for emotion and the force that binds it all. The relation between Spock and Kirk; despite of its premise, is the most human thing in this majestic tale where the adventures are endless. Encountering this original series, at this stage makes the execution look petty and a bit loose (the small technical aspects can be negotiated) but the writing is smart, gripping and hence completely overpowers it.

Unlike any other hit series, it only has 3 seasons so luckily it means that they will be covering up all their ideas within it until they are satisfied. As it often happens, the first season is always promising and has potential (or else it won't lift up for further more seasons) in it and is utilized with fine detailed work like focusing on different new breeds and characters bonding through this journey.

Not only was the concept intriguing enough to invest in it but even the writing is smart and gripping till the last frame holding the audience on the edge of the seat and delivers more than what was anticipated (the last act is written brilliantly).

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