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
Wilkie Cooper
Director of Photography
Jack Kitchin
Producer
Anthony Kimmins
Producer
Nigel Balchin
Screenplay
Richard Best
Editor
Benjamin Frankel
Original Music Composer
Anthony Kimmins
Director
Nigel Balchin
Novel
Alan Haines
Costume Design
Freddie Francis
Camera Operator
Alan Allen
Sound Recordist
Anne Head
Set Decoration
Cliff Richardson
Special Effects Supervisor
Eileen Bates
Hairstylist
John O'Gorman
Makeup Artist
William C. Andrews
Art Direction