Dangerous Assignment was an NBC radio drama starring Brian Donlevy broadcast in the US 1949–1953

Dangerous Assignment started out as a replacement radio series broadcast in the US on the NBC radio network in the summer of 1949; it became a syndicated series in early 1950. Reportedly, star Brian Donlevy himself was the one who brought the show to NBC. In the American radio shows, Donlevy was both the protagonist within the action and the narrator, giving the show "a suspenseful immediacy." The only other regular actor on the radio shows was Herb Butterfield, who played "The Commissioner." Many stage and screen actors appeared as guest-stars including, among many others, William Conrad, Raymond Burr, Paul Frees, Jim Davis, Dan O'Herlihy, Richard Boone, and Eddie Cantor. MORE at WIKIPEDIA