Lionel Atwill

Dr. Jerry Xavier

Fay Wray

Joanne Xavier

Lee Tracy

Lee Taylor

Preston Foster

Dr. Wells

John Wray

Dr. Haines

Harry Beresford

Dr. Duke

Arthur Edmund Carewe

Dr. Rowitz

Leila Bennett

Mamie

Robert Warwick

Commissioner Stevens

George Rosener

Otto, Dr. Xavier's Butler