26 user 8 critic

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 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


TV-PG | See all certifications »

Parents Guide:

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Official Sites:

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English | Swahili

Release Date:

8 September 1966 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




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Did You Know?


The costume of the M-113 creature was designed by Wah Chang. He obviously used a modified gas mask as the creature's mouth. The costume later appeared, displayed on the wall of Trelane's castle in Star Trek: The Original Series: The Squire of Gothos (1967). Later, the "creature" found a new home in Robert H. Justman's office, along with the two Gorn suits from Star Trek: The Original Series: Arena (1967) and the "frozen" mannequin from Star Trek: The Original Series: The Naked Time (1966). See more »


When Spock is recovering from his attack, he has green blood on his forehead, which is correct for a Vulcan. However, he also has an inexplicably red gash by the blood stain. 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 »


Spoofed in Red Dwarf: Psirens (1993) See more »


Theme From Star Trek
Written by Alexander Courage
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User Reviews

Not your typical monster episode.
29 December 2012 | by BlueghostSee all my reviews

On the surface of it this is a typical Vamp episode with a sci-fi twist. One might recall "King Lear" and the machinations of the King's daughters. That might partially explain the motivation of the antagonist, but there's more here. There's a basic functionality at work; predator and prey relationships, only this time they're encoded with a kind of intellectual gloss where the subject in question can camouflage themselves amongst the prey.

And that's another theme that's explored here. A man denied of companionship, starved for it, whose occupation doesn't lend himself to mixing with throngs of female suitors, finds that his companion is a subject of interest. What will he do when presented its talents, even though there's a deadly price to be paid? How bendable is a man when it comes to his more basic yearnings.

Another theme explores possible motivations of the creature, though even those are given a healthy amount of light, and we see the creature for all of its worth, when all is said and done.

The distant world of M-113 has ruins of a civilization that once way, but is no more. Dr. Crater is essentially marooned for the sake of his work, and whether it's the heat, his work, or lack of a moral compass, we're given some insight to, but it does not explain the entirety of his decision, and Captain James T. Kirk exposes the truth.

Do you destroy the living vestige of a lost empire? Do you kill off something that is an artifact of days long gone, but could destroy you? What would your decision be?

Again, on the surface it is a silly superficial monster episode. But if you listen to the dialogue carefully, there are some ideas there that should give you pause to think.


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