Star Trek Season 1 Episode 5 The Enemy Within ( Air Date 1966-10-06 ) Genre Sci-Fi & Fantasy, Drama category. Overview "A transporter malfunction causes Captain Kirk to split into his "good" and "evil" selves, and a landing party will freeze to death if they don't merge the two back together.".
Star Trek Season 1 Episode 5 The Enemy Within
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- Watch: Star Trek Season 1 Episode 5 The Enemy Within on CWR-CRB
- Stars: William Shatner, Leonard Nimoy, DeForest Kelley, James Doohan, Walter Koenig, George Takei, Nichelle Nichols
- Director: Robert H. Justman, Gene Roddenberry, John Meredyth Lucas, Gene L. Coon, Byron Haskin, John D. F. Black, Edward K. Milkis, Fred Freiberger
