The title is based on the movie/television series The Ghost and Mrs. Muir (1947), though this show is a spoof of the sitcom The Ghost & Mrs. Muir (1968), which was in its second season at this time.
First collaboration between Danny Arnold (director) and James Gregory (J.P. Morgan), who will go on to great success with the Arnold-created sitcom Barney Miller (1975), on which Gregory enjoyed a recurring role as Inspector Luger.