The Alternative Factor (Episode)

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Star Trek, Season 1, Episode 20
Star Trek
Season 1, Episode 20
"The Alternative Factor"
Stardate 3087.6
Series Star Trek
Episode Number 20
Release Date 30 March 1967
Writer Don Ingalls
Director Gerd Oswald

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.

Related Data

Astrometrics: Earth (Lazarus); Earth (Lazarus Alternate); Starbase 200
Cast & Crew: Brown, Robert; Derr, Richard; Doohan, James; Ingalls, Don; Kelley, DeForest; MacLachlan, Janet; Nichols, Nichelle; Nimoy, Leonard; Oswald, Gerd; Paskey, Eddie; Shatner, William; Takei, George
Chronology: Stardate 3087.6-3088.7; 2266
Culture: Hell
Education: doctor
Food: Coffee
People: Barstow; Kirk, James T.; Lazarus; Lazarus (Alternate); Leslie; Masters, Charlene; McCoy, Leonard; Scott, Montgomery; Spock; Sulu, Hikaru; Uhura, Nyota
Politics: Starfleet; Starfleet Ranks; United Federation of Planets
Science & Technology: Alternate Universes; Antimatter Universe; computer; dilithium; Fahrenheit; gravity; hydrogen; impulse drive; iron; magnetism; negative magnetic corridor; oxygen; parsec; phaser; satellites; silicon; time travel; transporter; tricorder; warp drive; warp nacelle
Ships & Vehicles: Constitution class; U.S.S. Enterprise NCC-1701; Lazarus' ship
Xenology: dinosaurs; Humans; Vulcans
Miscellaneous: Code One Alert
Prev: "Arena"
Star Trek, Season 1, Episode 20