Star Trek: The Original Series S01E05 "The Enemy Within" - Star Trek Screencaps.com

During a transporter accident aboard the USS Enterprise, Captain James T. Kirk is split into two distinct versions of himself: one reflecting his aggressive, darker nature, and the other his more compassionate, restrained side. As the crew, including Spock, Dr. McCoy, and Mr. Scott, struggle to manage the consequences of this division, they must find a way to reunite the two halves before the mission and the safety of the ship are compromised.

The Enemy Within is Season 1, Episode 5 of Star Trek: The Original Series. Directed by Leo Penn and written by Richard Matheson, it originally aired on October 6, 1966. Browse thousands of high-quality screencaps, episode stills and HD screenshots from this episode.

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