Members of the Enterprise crew beam down to investigate a planet, contrary to the warnings of the Melkot, who subsequently place Kirk and his men into a surreal recreation of the American Old West, where they must avoid the showdown with Wyatt Earp (Ron Soble), Doc Holliday (Sam Gilman), and crew at the OK Corral.
More intriguing than it probably has any right to be, "Spectre of the Gun" benefits from its bizarre surrealism, and has a Twilight Zone-esque atmosphere and aesthetic feel. Still, the story is sometimes stiffly executed, with dialog that has a tendency to repeat itself. At times it feels like the episode simply didn't have enough scenes to fill an hour, resulting in inefficient dialog being tacked on. There's dialog where characters make statements that are nothing short of obvious.
The ending revolves around the fact that mental discipline controls the unreality, so Spock mind melds with Kirk, Bones, and Scotty so they'll believe that unreal bullets can't really hurt them. Chekov? He dies. But he comes back to life—always a nice side effect of dying in non-reality.