Dimension X was an NBC radio program broadcast mostly on an unsponsored, sustaining basis from April 8, 1950, to September 29, 1951. The first 13 episodes were broadcast live, and the remainder were prerecorded. Fred Wiehe and Edward King were the directors, and Norman Rose was heard as both announcer and narrator, opening the show with: "Adventures in time and space... told [or transcribed] in future tense..." For two months, beginning on July 7, 1950, the series was sponsored by Wheaties.

Norman Rose was an American actor, film narrator and radio announcer whose velvety baritone was often called "the Voice of God" by colleagues. He was best known as the narrator's voice in the fictitious coffee grower's Juan Valdez Colombian coffee television commercials and the announcer-narrator of NBC's Dimension X.