Richard Diamond, Private Detective was a radio show starring Dick Powell which aired from 1949 to 1953, first on NBC, then ABC and finally on CBS. The title character was a rather light-hearted detective who often ended the episodes singing to his girlfriend, Helen. The television series was produced by Powell's company, Four Star Television, and that series ran for 3 years from 1957 to 1960. On TV, David Janssen played the hard boiled private eye and his secretary renamed âSamâ, was only ever shown on camera from the waist down, most assurardidly to display her beautiful legs. It was later leared that  the legs belonged to Mary Tyler Moore. Original music by Frank DeVol  and pete rugolo  and later by richard shores.  Good scripts,  a solid cast and Powellâs exceptional talent made a good time 30 minute program that was quite popular during that Golden Age of Radio. So Letâs sit back now, relax and enjoy this truly otr radio classic.,â, Dick powell  as Richard Diamond.., Private Detective.