X Minus One:
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There is a barrier of some kind that the Earth ships keep crashing into… or so they think. George Lefferts wrote the story. The cast includes Luis Van Rooten, Donald Buka, Wendell Holmes and Bill Griffis. Writer: George Lefferts.
X Minus One was a science fiction radio series on NBC that aired April 1955 through January 1958. The show featured stories written by some of the big names in 1950′s science fiction like Ray Bradbury, Robert Heinlein, and Issac Asimov.

