A movie actor playing a detective gets carried away with his role and starts trying to solve real-life crimes.

Jack Oakie
as Bill Martin

Ann Sothern
as Mary Strand

Eduardo Ciannelli
as Professor Herman

Alan Bruce
as Larry Frank, a movie stand-in

Edgar Kennedy
as Police Lt. Garrison

Joan Woodbury
as Doris Duane, a film actress

Bradley Page
as Ralph Waring

Paul Guilfoyle
as Gibbons, a film director

Willie Best
as Warts, Martin's manservant

William Corson
as Beckett