Margaret Rutherford

as Miss Jane Marple

Arthur Kennedy

as Paul Quimper

Muriel Pavlow

as Emma Ackenthorpe

James Robertson Justice

as Luther Ackenthorpe

Thorley Walters

as Cedric Ackenthorpe

Charles Tingwell

as Inspector Craddock

Conrad Phillips

as Harold Ackenthorpe

Ronald Howard

as Brian Eastley