The original pilot episode, which boldly went where no one had gone before.
The starship Enterprise, commanded by Captain Pike, runs across a distress signal which Pike discounts as being outdated, but when a follow-up message concerning survivors of an Earth ship is picked up, Pike follows the signals to Talos IV. Pike and a landing party find a group of almost-too-healthy survivors there. Among them is a young woman named Vina who catches Pike's eye and then leads him into a trap while showing him the crash site. Pike is captured by Talosians, aliens with much larger brains than humans, and is subjected to illusions which are designed to compel him to mate with Vina, who turns out to be a human in captivity. The rest of the crew, meanwhile, struggles to recover Pike, aware that the Talosians' power of illusion is an effective weapon.