Neil Hamilton
Bill Devons
Evelyn Venable
Pauline Ward
Jimmy Wallington
Nick Nicholls
Barbara Pepper
Althea Ames
Lucien Littlefield
Watchman
Lynne Roberts
Edna Mayberry (as Lynn Roberts)
Mystery
Hollywood Stadium Mystery
A boxer is killed in the ring, and the only clue is a tune that a man was whistling.