Dimension X was a groundbreaking science fiction radio show which aired on NBC from April 8, 1950, to September 29, 1951. The series was known for adapting and dramatizing the works of young, renowned writers such as Ray Bradbury, Robert Heinlein, Isaac Asimov, and Kurt Vonnegut. Dimension X gained credibility with science fiction fans due to the involvement of these well-known writers, and radio proved to be an excellent medium for exploring imaginative storylines.

Ernest Kinoy and George Lefferts served as the in-house scriptwriters, adapting stories while also contributing their own original work. The show's signature echoing "DIMENSION X-X-X-X" opened each episode, signaling listeners that they were about to embark on a journey into a different world. The series, directed by Fred Weihe and Edward King, featured actors such as Joe Di Santis, Wendell Holmes, Santos Ortega, and Jan Miner. Norman Rose, the deep-voiced narrator, set the tone with his iconic opening line, "Adventures in time and space...told in future tense..."

During its 17-month run, which included a five-month hiatus, Dimension X produced 50 episodes. The show's successful formula would later inspire NBC's X Minus One (1955-58), which featured many of the same actors and scripts. Dimension X's legacy is still evident today, as all 50 episodes have been preserved and can be enjoyed by radio enthusiasts and science fiction fans alike.