Star Trek S1E5 — The Enemy Within

7.6

Star Trek•Season 1•Episode 5

The Enemy Within

7.6/10 · 5,853 votesOct 6, 196650 min

Ranked #15 of 29 in Season 1•matches the season avg

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.

Directed byLeo Penn

Written byRichard Matheson

Previous episodeE4 · The Naked Time Next episodeE6 · Mudd's Women

Seasons3

Cast6

William Shatner

William Shatner

James T. Kirk

Leonard Nimoy

Leonard Nimoy

Spock

DeForest Kelley

DeForest Kelley

Dr. McCoy

James Doohan

James Doohan

Scott

George Takei

George Takei

Sulu

Nichelle Nichols

Nichelle Nichols

Uhura

Crew12

Richard Matheson

Richard Matheson

Writer

Leo Penn

Leo Penn

Director

G

Gerald Perry Finnerman

Director of Photography

R

Rolland M. Brooks

Art Direction

W

Walter M. Jefferies

Art Direction

F

Fabien D. Tordjmann

Editor

S

Sol Kaplan

Music

W

William Ware Theiss

Costume Design

I

Irving A. Feinberg

Property Master

J

Joseph G. Sorokin

Sound Editor

F

Fred B. Phillips

Makeup Artist

V

Virginia Darcy

Hairstylist

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Episode Summary

"The Enemy Within" is episode 5 of Star Trek season 1. It scored 7.6/10 from 5,853 votes, ranking #15 of 29 episodes this season (season average 7.6). Directed by Leo Penn and written by Richard Matheson, it aired on October 6, 1966.

Next: E6 · Mudd's Women Best of Season 1