"At the insistence of Ruth Van Rydock, an old schoolfriend who is convinced that there is something wrong, Miss Marple agrees to visit 'Stonygates', the country house of Ruth's sister."
Joan Hickson
as Miss Marple
Jean Simmons
as Carrie-Louise Serrocold
Joss Ackland
as Lewis Serrocold
Faith Brook
as Ruth van Rydock
Holly Aird
as Gina Hudd
Todd Boyce
as Walter Hudd
Tom Kerridge
as Keithie
Gillian Barge
as Mildred Strete
Neal Swettenham
as Edgar Lawson
David Horovitch
as Chief Inspector Slack
Ian Brimble
as Sergeant Lake
Christopher Villiers
as Alex Restarick
Jay Villiers
as Stephen Restarick
Saul Reichlin
as Dr. Maseryk
Matthew Cottle
as Ernie Gregg
John Bott
as Christian Gulbrandsen
Brenda Cowling
as Mrs. Rodgers
David Doyle
as Neville
Jake Wood
as Bert
Anne Atkins
as W.P.C
Stee Billingsley
as Dancer
John Walker
Director of Photography
Norman Stone
Director
T.R. Bowen
Writer
Bernard Ashby
Editor
Brian Willis
Costume Designer
Agatha Christie
Novel
George Gallaccio
Producer
Ian R. Wallace
Associate Producer