• 
  George Pollock

  regizor

• 
  Margaret Rutherford

  Miss Jane Marple
• 
  Charles Bud Tingwell

  Inspector Craddock
• 
  Lionel Jeffries

  Capitanul Rhumstone
• 
  William Mervyn

  Breeze-Connington
• 
  Roy Holder

  Marinar
• 
  Henry Oscar

  Lord Rudkin
• 
  Lucy Griffiths

  Millie

• 
  Stringer Davis

  Mr. Stringer
• 
  Gerald Cross

  Brewer
• 
  Francis Matthews

  Compton
• 
  Miles Malleson

  Bishop
• 
  Charles 'Bud' Tingwell

  Det. Insp. Craddock
• 
  Joan Benham

  Matron Alice Fanbraid
• 
  Terence Edmond

  Sgt. Bacon

• 
  Norma Foster

  Asst. Matron Shirley Boston
• 
  Lucy Griffiths

  Millie
• 
  Derek Nimmo

  Sub-Lt. Eric Humbert
• 
  Nicholas Parsons

  Dr. Crump