Michael Shayne is a generic title that can refer to any of three American old-time radio detective programs that were broadcast from 1944 to 1953. Specific titles varied with different versions of the show. They included Michael Shayne, Private Detective, The New Adventures of Michael Shayne, and The Adventures of Michael Shayne. Shayne was the main character in each version of the program, Phyllis Knight, a combination of secretary, sidekick, and girlfriend for Shayne, was also featured in the first and third versions, but the character did not appear in The New Adventures of Michael Shayne.