Broadcast on NBC from 19501951, Dimension X was among the first science fiction radio shows aimed at adults. The weekly half-hour series featured stories adapted from some of the top science fiction writers of the day, and many of its episodes were later recycled by its better-known successor, X Minus One.
The entire series survives today in digital form, and can be downloaded from The Internet Archive.
This series provides examples of
- Adaptational Alternate Ending: In the short story "Time And Time Again" by H. Beam Piper, the transfer of the 43-year-old Allan Hartley's mind into his 13-year-old self's body in 1945 is seemingly permanent. In the radio adaptation, the process reverses after only a few hours and the older Allan dies in both body and mind in 1975. As such, the radio version leaves it ambiguous as to whether his father Blake will succeed in being elected President in 1960 and preventing the outbreak of World War III. While he only has a vague impression of the events that the next 30 years will bring, he is determined to save his son's life. Blake also has the list of the race winners up to 1970 that Allan gave him before his mind returned to the future so he can still raise the necessary capital.
- Genre Anthology
- Let X Be the Unknown/"X" Makes Anything Cool
- Power Echoes: In the Title Sequence. "Dimension X!... X!... X!..."
- Spiritual Successor: X Minus One, which ran on NBC from 1955-1958, featuring many of the same cast members and reusing many of the same scripts.