Enterprise is dispatched to conduct health exams on a remote scientist and his wife, the latter of whom has a romantic history with Dr. McCoy. Soon, crewmembers begin to turn up dead, drained of all salt from the bodies -- and Captain Kirk must deal with an adversary that can hide in their midst.
Network executives reportedly selected this as the first Star Trek episode to air because it had a conventional alien menace that they felt positioned the show as proper science fiction. Leonard Nimoy once claimed that of all the episodes filmed to that point, it was the cast and crew's least favorite. I do find it marginally better than "The Cage" as a "beginning for Star Trek" -- though perhaps only because now, many characters who would become familiar are now in place.
It's interesting just how many scenes in the episode are purely about building these characters. Uhura has a flirtatious scene with Spock, in which she complains playfully about how tired she is of the word "frequencies." (I'm afraid I have bad news about your future.) Yeoman Rand and Sulu have a relaxed exchange in the arboretum -- and this follows a scene in which Rand effectively stands up for herself to a group of horny crewman. (That scene is dated, but Rand comes off well.) And at the center of the story, we get to see a lot of Dr. McCoy (even if Kirk accusing him of "thinking with his glands" seems pretty rich, in the fullness of time).
Like the characters, some aspects of Star Trek writ large are still being dialed in. What would become Sickbay is here called the "Dispensary." When Robert Crater is stunned by a phaser, his voice is pitched down and slurred in an unusual way that would eventually be abandoned. Kirk's log entries come from some unspecified future in which he knows more about what's happening than he actually does in the moment as the action unfolds. Of the four crewmen killed in the course of the episode, none wears a red shirt. And the moral consequences of exterminating a species are only reckoned with in a wistful line of dialogue at the very end of the episode.
But considering the limits of a television budget and schedule at the time, it's impressive just how much ends up on the screen. There are lots of background crew people to make Enterprise feel like a crowded ship. (And many are given a speaking line or two.) A shootout on the planet surface includes an impressive-for-the-time explosion of rock. And the salt monster costume, even though only shown on screen for a few seconds, is a creepy success. (Because of the money spent there, the plant puppet shown earlier in the arboretum is laughably simple.)
There's are still 1960s trapping that are hard to overlook. The storytelling is glacially paced. The repetition of plot points to make sure a less television-savvy audience follows along gets pretty awkward. Cringey dialogue pops up on a regular basis. And yet... yes, squint and tilt your head, and you can see signs of what Star Trek would become.
I give "The Man Trap" a C-. It's not a great start. But it is the start, the thing Trekkers celebrate every September 8th. (Fun trivia fact: two days earlier in Canada, which aired it first!)













