- After avoiding a Romulan ambush by entering a strange energy cloud, the Enterprise finds itself at the mercy of an insane ship's computer that indulges in a series of increasingly aggressive practical jokes.
- First Aired: September 21, 1974 - 23 Minutes Runtime
- William Shatner, Leonard Nimoy, DeForest Kelley, George Takei, James Doohan, Majel Barrett, James Doohan, Norm Prescott
Watch Star Trek: The Animated Series Season 2 Episode 3 - The Practical Joker
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Season 2 Episode 3 - Video Clips & Extras
Also starring Leonard Nimoy
Also starring James Doohan
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Star Trek: The Animated Series, Season 2 Episode 3, is available to watch and stream on NBC. You can also buy, rent Star Trek: The Animated Series on demand at CBS, Amazon Prime online.