• 
  Henry Hall

  Horace Debussy 'Sach' Jones
• 
  Gabriel Dell

  Gabe 'Gabie'
• 
  Dan Seymour

  Dr. Armand
• 
  Byron Foulger

  Prof. Quizard
• 
  Carmen D'Antonio

  Armand's Receptionist
• 
  Betty Compson

  Selena Webster
• 
  Pierre Watkin

  Dr. Rolfe Carter
• 
  Jack Cheatham

  Sergent de poliţie

• 
  William Austin (II)

  montaj
• 
  Otho Lovering

  editorial department
• 
  Edward J. Kay

  music department
• 
  George Milo

  set decorator
• 
  Augie Lohman

  special effects
• 
  Cy Endfield

  scriitor