"Mystery film based on an Agatha Christie play. An ambassador's wife must hide the corpse of her stepdaughter's unlikeable stepfather from her husband, who is bringing important visitors to their country home."
Glynis Johns
as Clarissa Hailsham-Brown
John Justin
as Henry Hailsham-Brown
Jack Hulbert
as Sir Rowland Delahaye
Cicely Courtneidge
as Miss Peake
Ronald Howard
as Jeremy
David Nixon
as Elgin
Wendy Turner
as Pippa
Basil Dignam
as Hugo
Joan Sterndale-Bennett
as Mrs. Elgin
Ferdy Mayne
as Oliver
Peter Butterworth
as Insp. Lord
Anton Rodgers
as Sgt. Jones
Robert Raglan
as Dr. Berry
Godfrey Grayson
Director
Eldon Howard
Writer
Albert G. Miller
Aldo Manganaro
Makeup Artist
Bill Lewthwaite
Editor
Tony Crombie
Original Music Composer
Norman G. Arnold
Art Direction
Elsie Alder
Hairstylist
Agatha Christie
Theatre Play
Harry Lee Danziger
Producer
Edward J. Danziger
James Wilson
Director of Photography
Peter Russell
Assistant Art Director
Story