One of radio's best anthologies of adult science fiction, Dimension X presented adaptations of stories from Isaac Asimov, Ray Bradbury, and more. We'll hear two tales from the series - each starring a private detective who gets more than he bargained for when he takes on an unusual case. First, it's a hunt for Martians on Earth in Donald Wollheim's "The Embassy' (originally aired on NBC on June 3, 1950). Then, in "Untitled Story" (originally aired on NBC on August 23, 1951), a gumshoe investigates a formula for eternal life. Finally, we'll hear Brian Donlevy as Steve Mitchell in Dangerous Assignment on a mission to investigate flying saucers and disappearing planes (originally aired on NBC on April 17, 1950).