The Adventures of Philip Marlowe was a radio series featuring Raymond Chandler's private eye, Philip Marlowe. The program first aired 17 June 1947 on NBC radio under the title The New Adventures of Philip Marlowe, with Van Heflin playing Marlowe. The show was a summer replacement for Bob Hope. The first episode adapted Chandler's short story \"Red Wind\". The NBC series ended 9 September 1947.
In 1948, the series moved to CBS, where it was called The Adventures of Philip Marlowe, with Gerald Mohr playing Marlowe. This series also began with an adaptation of \"Red Wind,\" using a script different from the NBC adaptation. By 1949, it had the largest audience on radio. The CBS version ran for 114 episodes, from September 26, 1948, to September 29, 1950.
In their book The A to Z of Old Time Radio, Robert C. Reinehr and Jon D. Swartz noted that the program differed from most others in its genre: \"It was a more hard-boiled program than many of the other private detective shows of the time, containing few quips or quaint characters.\"