Season 1, Episode 27 The Alternative Factor

Airs in 13 days 22 hours 22 min Friday, Nov 11, 6:20pm BBC

Kirk's investigation of an energy force takes him to a planet where he encounters Lazarus (Robert Brown), who is actually two people---one sane, one insane---from parallel universes. Barstow: Richard Derr. Lt. Charlene Master: Janet McLaghien. Kirk: William Shatner. Spock: Leonard Nimoy. Uhura: Nichelle Nichols.

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  • Rating: TV-PG
  • Premise: Capt. Kirk, Mr. Spock, Dr. McCoy and the USS Enterprise crew seek out new civilizations in this seminal sci-fi series. The ship's five-year mission may have only lasted three seasons on NBC, but its impact has proved timeless. By the 1970s, its rabid fans-… (more)

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