Star Trek The Alternative Factor (Season 1, Episode 27)
TV-PG
TV Episode | 50 min | Action, Adventure, Drama

Primary photo for The Alternative Factor

Star Trek

The Alternative Factor (Season 1, Episode 27)

TV-PG

TV Episode | 50 min | Action, Adventure, Drama

Existence itself comes under threat from a man's power-struggle with his alternate self, with the Enterprise's strained dilithium crystals presenting his key to a final solution.

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Cast	+ Add Cast
18 cast members

Name	Known for
William Shatner Captain James T. Kirk Captain James T. Kirk See fewer	Star Trek V: The Final Frontier (1989)
Leonard Nimoy Mr. Spock Mr. Spock See fewer	Star Trek IV: The Voyage Home (1986)
Robert Brown Lazarus Lazarus See fewer	Star Trek (1966)
DeForest Kelley Dr. McCoy Dr. McCoy See fewer	Star Trek (1966)
Janet MacLachlan Charlene Masters Charlene Masters See fewer	The Thirteenth Floor (1999)
Nichelle Nichols Uhura Uhura See fewer	Star Trek (1966)
Richard Derr Barstow Barstow See fewer	When Worlds Collide (1951)
Arch Whiting Assistant Engineer Assistant Engineer See fewer	Voyage to the Bottom of the Sea (1964)
Christian Patrick Transporter Chief Transporter Chief See fewer	Star Trek (1966)
Eddie Paskey Lesley Lesley See fewer	Star Trek (1966)
Bill Blackburn Lieutenant Hadley (uncredited) Lieutenant Hadley (uncredited) See fewer	Challenge the Wind (1991)
Vince Cadiente Security Guard (uncredited) Security Guard (uncredited) See fewer	Charlie Chan and the Curse of the Dragon Queen (1981)
Bill Catching Anti-Matter Lazarus Being #2 (uncredited) Anti-Matter Lazarus Being #2 (uncredited) See fewer	Mean Streets (1973)
Frank da Vinci Crewman (uncredited) Crewman (uncredited) See fewer
Carey Foster Enterprise crewmember (uncredited) Enterprise crewmember (uncredited) See fewer	Pajama Party (1964)
Tom Lupo Security Guard (uncredited) Security Guard (uncredited) See fewer	Eraser (1996)
Ron Veto Harrison (uncredited) Harrison (uncredited) See fewer	The Silent Service (1957)
Al Wyatt Sr. Anti-Matter Lazarus Being #1 (uncredited) Anti-Matter Lazarus Being #1 (uncredited) See fewer	Innerspace (1987)