The Alternative Factor (Episode)

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The Alternative Factor
"The Alternative Factor" (TOS20)

"The Alternative Factor" (TOS20)
Series Star Trek
Season 1
Episode 27
Production Number 20

Previous Arena (TOS19)
Next Tomorrow is Yesterday (TOS21)
Released 30 Mar 1967
Prime Timeline
(The root of all realities)

Stardate 3087.6: A mysterious being fights himself across two realities.

Orbiting a lifeless planet, the Enterprise's instruments detect a moment of "nonexistence" experienced throughout the universe. Starfleet Command believes it to be the prelude to an invasion, and Captain Kirk must determine its cause. When Spock's sensors detect the sudden presence of a humanoid life form on the planet, Kirk beams down and meets Lazarus. The stranger is actually two different people: one rational, the other a madman from what is described as an "antimatter" universe. The "nonexistence" effect is the result of the irrational Lazarus passing through a dimensional corridor between universes. The sane Lazarus steals the ship's dilithium crystals to prevent his mad counterpart from using them to open the rift between the parallel universes. When he discovers the truth, Kirk aids Lazarus in trapping his insane counterpart within the dimensional corridor, and the two Lazaruses will likely remain locked in combat in that area outside spacetime for all eternity, thus assuring the safety of both universes.

Image Gallery

Related Data

Astrometrics Earth; Lazarus' planet; Lazarus' planet (OS20); Milky Way galaxy; Starbase 200; universe
Chronology OS20 Timeline; Prime Timeline; 2267; Stardate 3087.6-3088.7
Culture checkers; chess; devil; Heaven; Hell
Education doctor; doctorate; physician
Food coffee
People Assistant Engineer; Barstow; Brent; Harrison; Kirk, James T.; Lazarus; Lazarus (OS20); Leslie; Lewis; Masters, Charlene; McCoy, Leonard; Security Officer; Security Officer 2; Spock; Transporter Chief; Uhura, Nyota
Politics Starfleet; Starfleet Command; Starfleet Ranks (Crewman, Ensign, Lieutenant, Lieutenant Commander, Commander, Captain, Commodore)
Science & Technology antimatter; atmosphere; audio receiver; biobed; blood; Class M planet; communications; communicator; companel; computer; deflector dish; dilithium; dimensional rift; electricity; Fahrenheit; fire; food slot; footprints; gravity; hydrogen; hypospray; impulse drive; inch; iron; lifeform; magnetic field; magnetism; mass; medical scanner; microtapes; nacelle; negative magnetic corridor; orbit; oxygen; PADD; parsec; phasers (Type 2, shipboard); photography; quadrant; radiation; rock; satellites; sensors; silicon; time (second, minute, hour); time travel; transporter; tricorder; turbolift; viewscreen; warp drive; water
Ships & Vehicles Constitution class; cruisers; U.S.S. Enterprise NCC-1701; Lazarus' ship; Lazarus' ship (OS20); timeships
Xenology bovines; dinosaurs; humanoids; Humans; hybrids; Vulcans
Miscellaneous bridge; captain's quarters; Code 1 Alert; commanding officer; first officer; General Alert; main engineering; rec room; sickbay; Starfleet delta; Starfleet Uniforms (2266)


William Shatner

Also Starring
Leonard Nimoy as Mr. Spock

Directed by
Gerd Oswald

Written by
Don Ingalls

Produced by
Gene L. Coon

Executive Producer
Gene Roddenberry

Created by
Gene Roddenberry

Associate Producer
Robert H. Justman

Script Consultant
Steven W. Carabatsos

Guest Star
Robert Brown as Lazarus

DeForest Kelley as Dr. McCoy
Janet MacLachlan as Charlene Masters
Nichelle Nichols as Uhura
Richard Derr as Barstow
Arch Whiting as Assistant Engineer
Christian Patrick as Transporter Chief
Eddie Paskey as Lesley

Music Composed and Conducted by
Alexander Courage

Director of Photography
Jerry Finnerman

Art Directors
Rolland M. Brooks
Walter M. Jefferies

Film Editor
James D. Ballas, A.C.E.

Assistant to the Producer
Edward K. Milkis

Assistant Director
Michael S. Glick

Set Decorator
Marvin March

Costumes Created by
William Theiss

Post Production Executive
Bill Heath

Music Editor
Jim Henrikson

Sound Editor
Douglas H. Grindstaff

Sound Mixer
Jack F. Lilly

Photographic Effects
Film Effects of Hollywood

Script Supervisor
Billy Vernon

Music Consultant
Wilbur Hatch

Music Coordinator
Julian Davidson

Special Effects
Jim Rugg

Property Master
Irving A. Feinberg

George H. Merhoff

Head Grip
George Rader

Production Supervisor
Bernard A. Widin

Makeup Artist
Fred B. Phillips, S.M.A.

Hair Styles by
Virginia Darcy, C.H.S.

Wardrobe Mistress
Maragaret Makau

Joseph D'Agosta

Glen Glenn Sound Co.

A Desilu Production

In Association with
Norway Corporation

Executive in Charge of Production
Herbert F. Solow