35 user 9 critic


While returning to the Enterprise aboard the shuttlecraft, Kirk, Spock, McCoy and a seriously ill Federation diplomat find themselves kidnapped by an energized cloud.


Ralph Senensky


Gene Roddenberry (created by), Gene L. Coon




Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
DeForest Kelley ... Dr. McCoy
Glenn Corbett ... Zefram Cochrane
Elinor Donahue ... Nancy Hedford
James Doohan ... Scott
George Takei ... Sulu
Nichelle Nichols ... Uhura


The Enterprise shuttlecraft, carrying Kirk, Spock, Dr. McCoy and critically ill Federation Ambassador Nancy Hedford, encounters a mysterious energy cloud which pulls them down to planet Gamma Canaris N. There they meet a castaway, a young man who purports to be Zefram Cochrane, inventor of the Warp Drive over 100 years ago. In history he had lived to be 80 years of age before disappearing somewhere in space. Apparently the same energy cloud which brought the shuttlecraft to the planet also found and rejuvenated Cochrane, making him effectively immortal. Unless Kirk can get themselves released soon, the ambassador, without vital medical treatment, will die. Written by Clive Wilson

Plot Summary | Plot Synopsis


TV-PG | See all certifications »


Official Sites:

Official site





Release Date:

10 November 1967 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:




Aspect Ratio:

1.33 : 1
See full technical specs »

Did You Know?


A view of the starship from dead center in front of the saucer section is used only in this episode. See more »


When Cochrane communicates with the entity the first time he is shown from one angle with two types of trees on either side of him several feet away. When the entity leaves, Cochrane is shown from the opposite angle with different trees much close to him. See more »


Captain James T. Kirk: There's no doubt about it, the Companion is female.
Zefram Cochrane: I don't understand.
Dr. McCoy: You don't? A blind man could see it with a cane. You're not a pet. You're not a specimen kept in a cage. You're a lover.
See more »

Alternate Versions

Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more »


Referenced in Star Trek: First Contact (1996) See more »

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User Reviews

A Gentle Story of Love and Affection
29 April 2014 | by HitchcocSee all my reviews

Zafram Cochrane, one of the pioneers of space science is on a planet. He has been for more than a hundred years. He has been kept alive by his association with an entity that looks like a little whirlwind that encompasses him, sparkling and turning. This turns out to be an act of passion and love. The problem is that Cochran is stuck there, not only because he is not allowed to leave but because he has feelings for this entity. Kirk and his crew come along, accompanied by a young woman who has been given a death sentence. She is played by Elinor Donahue, who played the eldest daughter on "Father Knows Best" and one of Andy Griffith's girlfriends on his show. She is bitter and angry, which is natural. Cochrane is attracted to her, but she is too into her misery to really allow this. I always liked this episode because there is a real humanity to it. A gentleness. Glenn Corbett, a guy we used to see all the time does a nice job of playing the low key Cochrane.

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