Margaret Rutherford as Miss Jane Marple

Lionel Jeffries as Captain Rhumstone

Stringer Davis as Jim Stringer

Charles Tingwell as Inspector Craddock

William Mervyn as Breeze-Connington

Henry Oscar as Lord Rudkin

Joan Benham as Alice Fanbraid

Nicholas Parsons as Dr. Crump

Miles Malleson as Bishop

Derek Nimmo as Sub-Lt. Eric Humbert

Gerald Cross as Brewer

Norma Foster as Asst. Matron Shirley Boston

Terence Edmond as Sgt. Bacon

Francis Matthews as Lt. Compton

Lucy Griffiths as Millie

Bernard Adams as Dusty Miller

Edna Petrie as Miss Pringle

Roy Holder as Petty Officer Lamb

Tony Quinn as Tramp