S1·E5 The Enemy Within
Core
Aired October 6, 1966 50 min ★ 7.3/10 · 63 TMDB votes
Synopsis
Split by a transporter malfunction into two beings with very different personalities, the resulting twin Captain Kirk proves that neither a purely evil nor a sweetly good captain can survive without the missing half.
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Director & writers
Richard MathesonWriterLeo PennDirector
Guest stars
Frequently Asked Questions
When did Season 1 Episode 5 of Star Trek air?
Season 1, Episode 5 ('The Enemy Within') originally aired on October 6, 1966.
How long is Season 1 Episode 5 ('The Enemy Within')?
The runtime for this episode is approximately 50 minutes.
What happens in Star Trek Season 1 Episode 5?
Split by a transporter malfunction into two beings with very different personalities, the resulting twin Captain Kirk proves that neither a purely evil nor a sweetly good captain can survive without the missing half....