Season 2, Episode 18 The Immunity Syndrome

The Enterprise becomes an antibody to penetrate an energy-draining invader resembling a giant amoeba that has annihilated a star system---and is about to reproduce. Lt. Kyle: John Winston. Kirk: William Shatner. Spock: Leonard Nimoy. McCoy: DeForest Kelley. Scott: James Doohan. Chekov: Walter Koenig. Uhura: Nichelle Nichols.

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Guest Cast