AllMovie

Traveling on a diplomatic mission to meet with the leaders of the planet of Gideon, Captain Kirk instead finds himself aboard a ghostly version of the Enterprise in this episode of the landmark science fiction series. Having fallen victim to what appears to be a transporter mishap, Kirk wanders through an abandoned copy of his own starship. There is only one other soul on board, a woman named Odona, who cannot -- or will not -- explain her presence. But Kirk eventually discovers that his strange situation was brought about by the leaders of Gideon, and that it may be somehow related to the planet's severe over-population. Kirk must find a way to escape from the shadow starship before it is too late for himself and for the people of Gideon.