The Alternative Factor

Mar 30, 1967 on NBC at 8:30 PM
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Summary

Kirk and Spock encounter an alien named Lazarus who claims to be from an anti-matter universe.

Previous episode

Errand of Mercy
Season 1 Episode 26

Mar 23, 1967

Next episode

The City on the Edge of Forever
Season 1 Episode 28

Apr 06, 1967

Guest stars

Al Wyatt, Arch Whiting, Bill Catching, Carey Foster, Christian Patrick, Eddie Paskey, Frank da Vinci, Gary Coombs, Janet MacLachlan, Larry Riddle, Richard Derr, Robert Brown, Ron Veto, Tom Lupo, Tom Steele, Vince Calenti, William Blackburn