Burgess Meredith
Felix Milne
Dulcie Gray
Patricia Milne
Michael Shepley
Peter Edge
Christine Norden
Barbara 'Babs' Edge
Kieron Moore
Adam Lucian
Barbara White
Molly Sinclair Lucian
Walter Fitzgerald
Dr. Norris Pile
Edgar Norfolk
Sir George Freethorne
John Laurie
Dr. James Garsten
Martin Miller
Dr. Hans Tautz
Clive Morton
Robert Paston
Joss Ambler
Julian Briant
Jack Raine
Inspector Pierce
Laurence Hanray
Dr. Lefage
Helen Haye
Lady Maresfield
John Stuart
Dr. John Hayling
Ronald Simpson
Mr. Grandison
Gwynne Whitby
Miss English
Malcolm Dalmayne
Charlie Oakes
Michael Hordern
Co-Counsel at Inquest
Jack Howarth
Party Guest
Geoffrey Sumner
Parkinson
Jack Kitchin
Producer
Nigel Balchin
Screenplay
Richard Best
Editor
Wilkie Cooper
Director of Photography
Nigel Balchin
Novel
Anthony Kimmins
Producer
Anthony Kimmins
Director
Benjamin Frankel
Original Music Composer
Freddie Francis
Camera Operator
John O'Gorman
Makeup Artist
Alan Allen
Sound Recordist
William C. Andrews
Art Direction
Alan Haines
Costume Design
Cliff Richardson
Special Effects Supervisor
Anne Head
Set Decoration
Eileen Bates
Hairstylist