This series was a very popular radio show that starred Dick Powell as the sexy sleuth. It ran for a few years in the early 1950s. When Powell was approached to do a TV series he felt he was too old but recommended a young actor named David Janssen.
Sam (Mary Tyler Moore) the switchboard operator's legs and hands were all that were ever seen of her on-camera during this series. Moore's voice was heard on the soundtrack but her face was never revealed