Dimension X was a groundbreaking science fiction anthology series that aired on NBC from April 8, 1950, to September 29, 1951. It is celebrated as one of the first radio programs to treat science fiction as a serious, adult-oriented genre rather than "juvenile" space adventures like Buck Rogers . Format : Half-hour episodes featuring standalone stories of futuristic technology, space exploration, and time travel. Narrator : The series was famously opened by Norman Rose , whose deep voice intoned: "Adventures in time and space, told in future tense... Dimension X!" over a haunting echo and a slow-pounding bass drum. Authors : The show gained instant credibility by adapting stories from the era's leading sci-fi writers, including Ray Bradbury , Isaac Asimov , Robert Heinlein , Kurt Vonnegut , and Robert Bloch . Successor : It was the direct precursor to the even more famous series X Minus One (1955–1958), which recycled many of the same scripts and actors. Not...