X Minus One
Initially a revival of NBC's Dimension X (1950–51), the first 15 episodes of X Minus One were new versions of Dimension X episodes, but the remainder were adaptations by NBC staff writers, including Ernest Kinoy and George Lefferts, 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 by Kinoy and Lefferts.
Included in the series were adaptations of Robert Sheckley's "Skulking Permit," Bradbury's "Mars Is Heaven", Heinlein's "Universe" and "The Green Hills of Earth", " Pohl’s "The Tunnel under the World", J. T. McIntosh’s "Hallucination Orbit", Fritz Leiber’s "A Pail of Air", and George Lefferts' "The Parade".
The program opened with announcer Fred Collins delivering the countdown, leading into the following introduction (although later shows were partnered with Galaxy Science Fiction rather than Astounding Science Fiction):
- Countdown for blastoff... X minus five, four, three, two, X minus one... Fire! [Rocket launch SFX] 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 series was canceled after the 126th broadcast on January 9, 1958. However, the early 1970s brought a wave of nostalgia for old-time radio; a new experimental episode, "The Iron Chancellor" by Robert Silverberg, was produced in 1973, but it failed to revive the series. NBC also tried broadcasting the old recordings, but their irregular once-monthly scheduling kept even devoted listeners from following the broadcasts.
In November 2008, Counter-Productions Theatre Company became the first theatre company to stage three episodes, "The Parade", "A Logic Named Joe", and "Hallucination Orbit".
Episodes based on stories by famous writers 
- Philip K Dick - "The Defenders", "Colony"
- Ray Bradbury - "And The Moon Be Still As Bright", "Mars is Heaven", "The Veldt", "Dwellers in Silence", "Zero Hour", "To the Future", "Marionettes, Inc.", "There Will Come Soft Rains"
- Isaac Asimov - "Nightfall", "C-Chute", "Hostess"
- Robert A. Heinlein - "Universe", "The Green Hills of Earth", "Requiem", "The Roads Must Roll"
- L. Sprague de Camp - "A Gun for a Dinosaur"
Where to listen to X Minus One 
- X Minus One is currently broadcast regularly on Sirius/XM Radio Classics (Channel 82)
- X Minus One is currently broadcast regularly at Relic Radio, a free web radio that only plays old radio drama shows.
- X Minus One is currently broadcast regularly at Krypton Radio, a free web radio that plays science fiction, comic book and adventure themed music, news, and radio plays (see also: Krypton Radio).
- X Minus One is available on the Old Time Radio App available on most smart phones.
- Listen to space travel related episodes at Spacemen's Luck
- Listen to the single episodes at the free Internet archive
See also 
- Dimension X, the predecessor to X Minus One with 15 of the same stories.
- 2000 Plus, the first adult science fiction series on U.S. radio.
- Audio theatre
- Old-time radio
- Tales of Tomorrow, a short lived 1953 radio anthology with only 15 episodes, 4 stories of which were also made into X Minus One episodes.
Listen to 
- OTRRG certified X Minus One series (singles/zipped sets)
- X Minus One - The "Official" Site
- X Minus One in The Internet Archive's Old-Time Radio Collection
- OTR Network Library (123 episodes, including 1973 revival)
- Botar: X Minus One
- X Minus One Listen online 10pm ET, Tuesdays, WHAV