The Alternative Factor
©1978 Paramount Pictures Corp. All rights reserved.
The City on the Edge of Forever
©1978 Paramount Pictures Corp. All rights reserved.
Episode 20 Episode 28
Airdate March 30, 1967 Airdate April 6, 1967
Next Voyage The City on the Edge of Forever #28 Next Voyage Operation-Annihilate! #29

Catalog Number LV60040-93
Format Extended Play CLV
Running Time 102 minutes
Side Running Time
1 52min 04sec
2 51min 42sec
103min 46sec
Pressing Location Pioneer Video Manufacturing
Retail Price $29.98
Issued January 3, 1986

The Alternative Factor
Directed by Gerd Oswald
Written by Don Ingalls
Produced by Gene L. Coon
Executive Producer Gene Roddenberry
Starring William Shatner
Leonard Nimoy
Guest Star Robert Brown
Stardate 3087.6
In orbit around an unknown planet, the Enterprise experiences a moment of "nonexistence" - all natural laws are suspended. On the planet's surface, Kirk encounters Lazarus (Robert Brown), who blames this disturbance on his evil enemy. Aboard the starship, Lazarus steals vital dilithium crystals, and we learn that Lazarus' look-alike foe is from an anti-matter universe. If Kirk can't prevent them from meeting, both universes will be annihilated!

This episode features a rare angle of the Enterprise firing phasers from orbit.


The City on the Edge of Forever
Directed by Joseph Pevney
Written by Harlan Ellison
Produced by Gene L. Coon
Executive Producer Gene Roddenberry
Starring William Shatner
Leonard Nimoy
Guest Star Joan Collins
Featuring DeForest Kelley
Stardate 3134.0
Kirk, Spock and McCoy trapped in the 20th century!

Accidentally overdosed with cordrazine, a delirious McCoy (DeForest Kelley) transports to the planet below. Kirk (William Shatner), Spock (Leonard Nimoy) and a landing party discover a "time portal" through which McCoy disappears! Suddenly the Enterprise vanishes, and Kirk and Spock must enter the vortex to search for McCoy. Arriving in 1930, Kirk falls deeply in love with Edith Keeler (Joan Collins), only to learn she must die in order for time to return to normal!

Some music has been changed for the Home Video version of this episode.


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Updated: December 20, 2015
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