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After finding himself erased from recent history, Spock must travel back in time to save himself as a youth.


Hal Sutherland


Gene Roddenberry (created by), D.C. Fontana




Episode complete credited cast:
William Shatner ... Capt. Kirk (voice)
Leonard Nimoy ... Mr. Spock (voice)
DeForest Kelley ... Dr. McCoy (voice)
George Takei ... Sulu (voice) (credit only)
Nichelle Nichols ... Uhura (voice) (credit only)
Majel Barrett ... Amanda Grayson / Grey (voice)
James Doohan ... Scott / Guardian of Forever / Aleek-Om / Bates / Lt. Erikson / Commander Thelin / Vulcan Healer (voice)


Upon his return from a journey through the Guardian of Forever Kirk realizes that history has been altered and no one remembers Spock. An Andorian is now his First Officer and it appears that Spock met an untimely death during a childhood ritual on Vulcan. Spock must use the Guardian again and return to the Vulcan of his youth and restore his time line. Written by tomtrekp

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TV-PG | See all certifications »

Did You Know?


James Doohan recorded the lines for Sarek but they were not used when it was found Mark Lenard was available to do the lines. See more »


There are a number of mistakes concerning the Guardian Of Forever. In Star Trek: The Original Series: The City on the Edge of Forever it was surrounded closely by ruins. In this cartoon it is shown in a clearing with only remnants of them. The voice was originally quite deep, and slightly enhanced electronically. The entire "ring" flashed in synchronization with its speech. Here the voice is much higher pitched; sounding old and weak. There is no flashing during its dialogue. Additionally, it now has the ability to "prepare" a time and place to receive the time traveler where as it originally could only show the past like an extremely sped up film. Reaching the exact time and place desired required careful calculations with no guarantee of complete success. See more »


Mr. Spock: A Vulcan would face such a loss without tears.
Young Spock: How?
Mr. Spock: By understanding every life comes to an end when time demands it. Loss of life is to be mourned, but only if the life was wasted.
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Referenced in Star Trek (2009) See more »

User Reviews

Spock Finds His Past
17 March 2017 | by HitchcocSee all my reviews

When Spock and Kirk return through a time portal like the one in "The City on the Edge of Tomorrow," that many consider the best episode of the original series. When they appear, the only one who knows Spock is Kirk. When he gets to the ship, an Andorean has his job. Spock must go back in time and meet himself as a child. Something must have happened when he was a boy with a Vulcan father (Sarek) and a human mother. He must find out what the variable is and change it before he returns. This is a really good episode. I'm not nearly as caught up in the animations shortcomings because the story is engaging.

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Release Date:

15 September 1973 (USA) See more »

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Color | Color (technicolor)
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