Raymond Chandler's celebrated hard-boiled private eye, Philip Marlowe, made his radio debut in 1945 on the Lux Radio Theatre with "Murder My Sweet," starring Dick Powell. Two years later, NBC brought the character to the air in his own weekly series starring Van Heflin, The New Adventures of Philip Marlowe. A summer replacement for The Bob Hope Show, the series was short-lived, ending September 9, 1947. CBS revived it in 1948 with The Adventures of...