Elenco

• 

  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

• G

  George Rosener

  Otto, Dr. Xavier's Butler