• 
  Walter Forde

  regizor

• 
  Val Guest

  scenarist
• 
  Frank Launder

  scenarist
• 
  J.O.C. Orton

  scenarist

• 
  Gordon Harker

  Inspector Hornleigh
• 
  Alastair Sim

  Sergeant Bingham
• 
  Phyllis Calvert

  D-na Wilkinson
• 
  Edward Chapman

  D-ul Blenkinsop

• 
  Charles Oliver

  Dr. Wilkinson
• 
  Raymond Huntley

  Dr. Kerbishley
• 
  Percy Walsh

  Inspector Blow
• 
  Peter Gawthorne

  colonel
• 
  Wally Patch

  Sergent Maior
• 
  Betty Jardine

  Daisy
• 
  Arthur Hambling

  Joe

• 
  Bill Shine

  Hotel Porter
• 
  Edward Underdown