X Minus One, widely regarded as one of the finest science fiction dramas ever produced for radio, was broadcast on NBC from 1955 until 1958. It began as a revival of NBC's Dimension X, which ran for just a year and a half, from 1950 to 1951.

Dimension X was one of old-time radio's first adult science-fiction shows. Though it ran for only a short time, the show made its mark by adapting short stories written by some of the best-known masters of the genre - Isaac Asimov, Ray Bradbury, Robert Heinlein, Kurt Vonnegut, and others. Writers Ernest Kinoy and George Lefferts adapted the stories, occasionally contributing original scripts of their own.

Taking its name from a popular series of mystery novels, Inner Sanctum Mysteries debuted over NBC's Blue Network in January 1941. It featured one of the most memorable and atmospheric openings in radio history: an organist hit a dissonant chord, a doorknob turned, and the famous "creaking door" slowly began to open. Every week, Inner Sanctum Mysteries told stories of ghosts, murderers, and lunatics.

Before TV’s The Twilight Zone, there was radio’s The Inner Sanctum Mystery, Lights Out!, The Weird Circle, and so many other great mysteries starring Orson Welles, Jane Wyman, Dana Andrews, Edmond O’Brien, James Cagney and more. 100 great mystery classics in one collection.

Head to distant worlds and alternate futures! Explore the limitless potential for twists and turns when stories are fueled by the infinite power of imagination! Here are twenty-four thought-provoking tales as up-to-date as tomorrow. It's new-time radio in the classic old-time-radio manner, from the mind of producer Jim French.