Dustin Hoffman

Wally Stanton

Vanessa Redgrave

Agatha Christie

Timothy Dalton

Archie Christie

Helen Morse

Evelyn

Celia Gregory

Nancy Neele

Paul Brooke

John Foster

Carolyn Pickles

Charlotte Fisher

Timothy West

Kenward

Tony Britton

William Collins

Alan Badel

Lord Brackenbury

Robert Longden

Pettelson

Yvonne Gilan

Mrs. Braithwaite

Sandra Voe

Therapist

David Hargreaves

Sgt. Jarvis

Tim Seely

Capt. Rankin

Christopher Fairbank

Luland

Liz Smith

Flora

Peter Arne

Hotel Manager

Harry Segall

Hotel Trio

Tony Haygarth

Man Drinking Tea (uncredited)

Stan Richards

Hotel Porter (uncredited)