"Countdown for blastoff...X minus five, four, three, two, X minus one.... Fire! From the far horizons of the unknown come transcribed tales of new dimensions in time and space. These are stories of the future - adventures in which you'll live in a million could-be years on a thousand may-be worlds."

Thus began each episode of X Minus One, a half-hour science fiction radio series that was broadcast from 1955 until 1958. Initially a revival of NBC's Dimension X, the first 15 episodes were new versions of Dimension X episodes, but the remainder were adaptations by NBC staff writers of newly published science fiction stories by leading writers in the field, including Isaac Asimov, Ray Bradbury, Philip K. Dick, Robert A. Heinlein, Frederik Pohl, and Theodore Sturgeon, along with some original scripts. Paving the way with fresh, imaginative stories, X Minus One is widely considered among the finest science fiction dramas ever produced for radio.

Episodes included: "Dr. Grimshaw's Sanitorium", "Shanghaied", "The Castaways", "Vital Factor", "Hallucination Orbit", "The Defenders", "If You Was a Moklin", "Wherever You May Be", "The Last Martian", "The Moon Is Green", "Venus Is a Man's World", and "The Trap".