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The City on the Edge of Forever 

When a temporarily insane Dr. McCoy accidentally changes history and destroys his time, Kirk and Spock follow him to prevent the disaster, but the price to do so is high.


Joseph Pevney


Harlan Ellison, Gene Roddenberry (created by)




Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
Joan Collins ... Edith Keeler
DeForest Kelley ... Dr. McCoy
James Doohan ... Scott
George Takei ... Sulu
Nichelle Nichols ... Uhura
John Harmon ... Rodent
Hal Baylor ... Policeman
David L. Ross ... Galloway
John Winston John Winston ... Transporter Chief
Bart La Rue Bart La Rue ... Guardian (voice) (as Bartell La Rue)


When an accident causes Dr. McCoy to go temporarily insane, he escapes to a strange planet. There, the search party discovers a device left by a superior, vanished civilization, a time portal that plays the history of Earth for them - but then Bones jumps through it into the past, causing a change in history important enough to make the Enterprise vanish. Kirk and Spock, who fortunately made a tricorder recording, must attempt to go through to just before McCoy's arrival and stop him from changing history in the United States during the Great Depression, where they have no advanced technology available. Written by KGF Vissers

Plot Summary | Plot Synopsis


TV-PG | See all certifications »

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Did You Know?


This was the most expensive episode produced during the first season, with a budget of $245,316, and also the most expensive episode of the entire series, except the two pilots. The average cost of a first season episode was around $190,000. Also, production went one and a half days over schedule, resulting in eight shooting days instead of the usual six. See more »


One building front shows a fallout shelter sign, not used until after WWII. See more »


Dr. McCoy: Assassins! Murderers! Murderers! Assassins!
[he spots a homeless man]
Dr. McCoy: You! What planet is this?
[the homeless man runs away]
Dr. McCoy: [chasing after him, shouting crazily] No! Don't run! I won't kill you! It's *they* who do the killing! Don't run! I won't kill you!
See more »

Crazy Credits

Script Supervisor George Rutter is written as "SCPIPT SUPERVISOR...GEORGE A. RUTTER" in the credits. This happened on at least two other episodes in season one. See more »

Alternate Versions

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


Referenced in Star Trek: Enterprise: Storm Front (2004) See more »


Theme From Star Trek
Written by Alexander Courage
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User Reviews

Shatner's finest performance of the series
22 March 2006 | by woljm45See all my reviews

After Bones accidentally injects himself with a shot that causes him to have dementia, he jumps into a time-travel gateway and lands in New York in the 1930's. Kirk and Spock must go in after him and prevent him from doing something in the past that could alter the future. Kirk finds a love interest, played by Joan Collins, but comes to find out that she will play a key role in determining the outcome of Earth's future. Without spoiling it, lets just say it appears Kirk will never have a steady love relationship as long as he is captain. Great job by Shatner and leaves you numb at the end. He even uses the word "hell', which was probably a big deal on television in the late 60's.

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Release Date:

6 April 1967 (USA) See more »

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Technical Specs


Sound Mix:



Color | Black and White (flashbacks)

Aspect Ratio:

1.33 : 1
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