Character actor Simon Oakland, highly unrecognizable under layers of makeup, plays an alien that takes a group of unsuspecting amusement park guests on a trip to outer space. The "crew" of the ride (Don Gordon and Janet De Gore) have no idea that the alien has made the craft suitable for flight and they, too, become captives of the alien's machinations.
John McLiam and Angela Clarke portray a bickering couple while Yale Summers, later to be featured on "Daktari" is on hand as the resident "jock" forced to show his mettle in the life-threatening kidnapping.
There are many plot holes in the episode, especially the fact that the alien is able to turn the ride into a functional rocket, but the performances by Oakland and McLiam make for an entertaining episode of the classic show.