While the first 15 episodes were new versions of the earlier radio series, the rest of the 126 shows were adaptations of then current science fiction stories.

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. The National Broadcasting Company, in cooperation with Street and Smith, publishers of Astounding Science Fiction presents... X Minus One.

The programs included in this collection are the first fifteen episodes which aired.

EPISODES:

1. No Contact
April 24, 1955

2. The Parade
May 1, 1955

3. Mars is Heaven
May 8, 1955

4. Universe
May 15, 1955

5. Knock
May 22, 1955

6. The Man in the Moon
May 29, 1955

7. Perigi's Wonderful Dolls
June 5, 1955

8. The Green Hills of Earth
July 7, 1955

9. Dr. Grimshaw's Sanitorium
July 14, 1955

10. Nightmare
July 21, 1955

11. The Embassy
July 28, 1955

12. The Veldt
August 4, 1955

13. Almost Human
August 11, 1955

14. Courtesy
August 18, 1955

15. Cold Equations
August 25, 1955