Errand of Mercy
©1978 Paramount Pictures. All rights reserved.
Episode:  27     Airdate:  March 23, 1967
The Alternative Factor
©1978 Paramount Pictures. All rights reserved.
Episode:  20     Airdate:  March 30, 1967
The City on the Edge of Forever
©1978 Paramount Pictures. All rights reserved.
Episode:  28     Airdate:  April 6, 1967
Operation - Annihilate!
©1978 Paramount Pictures. All rights reserved.
Episode:  29     Airdate:  April 13, 1967

Catalog Number 14241-7
Running Time 200 minutes
Issued April 28, 2009
Languages / Channels DTS 7.1 HD-MA English
Dolby 2.0 English
Dolby 2.0 Spanish
Dolby 2.0 French
Interactive Menus
Episode Run Time
27 50min 22sec
20 50min 26sec
28 50min 20sec
29 50min 24sec

Errand of Mercy
Directed by John Newland
Written by Gene L. Coon
Produced by Gene L. Coon
Executive Producer Gene Roddenberry
Starring William Shatner
Leonard Nimoy
Guest Stars John Abbott
John Colicos
Stardate 3198.4
This is the first time we meet the Klingons, who threaten the Federation.

Kirk and Spock attempt to persuade the council of neutral Organia to join the Federation. While they negotiate, the nefarious Klingons invade and enslave the planet's sheeplike citizens. The Organians kelp Kirk and Spock disguise themselves as civilians, only to hand them over to the Klingons! The Enterprise and the Klingon ship poise to engage in an all-out battle!


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!


Operation - Annihilate!
Directed by Herschel Daugherty
Written by Steven W. Corbatsos
Produced by Gene L. Coon
Executive Producer Gene Roddenberry
Starring William Shatner
Leonard Nimoy
Featuring DeForest Kelley
Stardate 3287.2
Spock possessed by deadly alien!

The Enterprise arrives at Deneva, a planet in the path of an interplanetary epidemic of mass insanity. There, Kirk finds his brother Sam dead, his sister-in-law stricken, and his nephew unconscious. Then, Spock is attached by a flying creature! These telepathically connected parasites invade the nervous system and control their victims through pain in an effort to take over the galaxy! Can McCoy find a way to kill the aliens without harming their hosts?


CBS Paramount Television
Updated: May 4, 2009
©2009 Blam Entertainment Group