The Original Series: Season 1 (1966-1967)
S01E28

The City On The Edge Of Forever

Stardate: 3134.0 Year: 2267

Dr. McCoy becomes unbalanced and disappears through a portal.

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Broadcast: 6 April 1967
Format: Episode Prod #: 028
Writer(s): Harlan Ellison
Director(s): Joseph Pevney
Story Order: 196 | Correct Order: 29