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The Man Trap 

Dr. McCoy discovers his old flame is not what she seems after crew members begin dying from a sudden lack of salt in their bodies.


Marc Daniels


George Clayton Johnson, Gene Roddenberry (created by)




Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
Jeanne Bal ... Nancy Crater
Alfred Ryder ... Prof. Robert Crater
DeForest Kelley ... Dr. McCoy
Grace Lee Whitney ... Yeoman Janice Rand
George Takei ... Sulu
Nichelle Nichols ... Uhura
Bruce Watson ... Green
Michael Zaslow ... Darnell
Vince Howard ... Crewman
Francine Pyne Francine Pyne ... Nancy III


In the series premiere, the Enterprise visits planet M-113 where scientists Dr. Crater and his wife Nancy, an old girlfriend of Dr. McCoy, are studying the remains of an ancient civilization. When Enterprise crewmen begin turning up dead under mysterious circumstances, Kirk and Spock must unravel the clues to discover how, why, and who is responsible. Written by JW Kearse

Plot Summary | Plot Synopsis


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Did You Know?


The visual of the planet M-113 from orbit is reused footage previously representing planet Alfa 177 in Star Trek: The Original Series: The Enemy Within (1966) (although that episode aired after this Star Trek: The Original Series: The Man Trap (1966)). This planet effect was economically reused again many times during the original series, as Tantalus V in Star Trek: The Original Series: Dagger of the Mind (1966), Planet Q and Benecia in Star Trek: The Original Series: The Conscience of the King (1966), the iron-silica planet in Star Trek: The Original Series: The Alternative Factor (1967), Beta III in Star Trek: The Original Series: The Return of the Archons (1967), Janus VI in Star Trek: The Original Series: The Devil in the Dark (1967), Organia in Star Trek: The Original Series: Errand of Mercy (1967), Mudd's planet in Star Trek: The Original Series: I, Mudd (1967), Argus X in Star Trek: The Original Series: Obsession (1967), and Ardana in Star Trek: The Original Series: The Cloud Minders (1969). See more »


Professor crater identifies human incisor teeth as having once been fangs. This is incorrect. The canine teeth were originally fangs. See more »


[first lines]
Captain James T. Kirk: Captain's log, stardate 1513.1. Our position, orbiting planet M-113. On board the Enterprise, Mr. Spock, temporarily in command. On the planet, the ruins of an ancient and long-dead civilization. Ship's surgeon McCoy and myself are now beaming down to the planet's surface. Our mission: routine medical examination of archeologist Robert Crater and his wife Nancy. Routine but for the fact that Nancy Crater is that one woman in Dr. McCoy's past.
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Alternate Versions

Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more »


Referenced in Star Trek: The Original Series: The Squire of Gothos (1967) See more »


Theme From Star Trek
Written by Alexander Courage
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User Reviews

Quite a Salty Episode
23 April 2014 | by HitchcocSee all my reviews

This is really quite good. The crew goes to a planet where Dr. Crater and his wife are due for a required checkup. They have been on the planet for five years. Mrs. Crater is a former love interest of Dr. McCoy and he looks forward with trepidation to seeing her. When the away team gets there each of them sees this woman in different. To McCoy, she appears to be as young as when they last met; Kirk sees her as one of an appropriate age; and the other crewman sees her as a woman from a pleasure colony. Now the bodies start to pile up. The men meet Dr. Crater who is uncooperative and unfriendly. A scream is heard outside and upon investigation, the body of the third crewman lies dead, circular burn-like marks on his skin. The central issue has something to do with salt. The body, when investigated, is lacking salt. Mrs. Crater is really worried that their salt supply is dissipated. Soon even more bodies are found. The thing is a shape-changer and it begins to find ways of attacking crew members to remove its salt.

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Greek | English | Swahili

Release Date:

8 September 1966 (USA) See more »

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