Donald Pleasence
Dr. Hawley Harvey Crippen
Acting
Coral Browne
Belle Crippen
Acting
Samantha Eggar
Ethel Le Neve
Acting
Donald Wolfit
R.D. Muir (as Sir Donald Wolfit)
Acting
James Robertson Justice
Captain McKenzie
Acting
Geoffrey Toone
Mr. Tobin
Acting
Douglas Bradley-Smith
Dr. Pepper
Acting
Olga Lindo
Mrs. Clara Arditti
Acting
Elspeth March
Mrs. Jackson
Acting
Paul Carpenter
Bruce Martin
Acting
John Arnatt
Chief Inspector Dew
Acting
Oliver Johnston
Lord Chief Justice
Acting
John Lee
Harry
Acting
Edward Underdown
The Governor
Acting
Hamilton Dyce
Dr. Rogers
Acting
Basil Henson
Mr. Arditti
Acting
Totti Truman Taylor
Miss Curnow
Acting
Edward Cast
Harding
Acting
Colin Rix
Chemist
Acting
Terence Brook
Police Sergeant Outside Courtroom (uncredited)
Acting
Eric Dodson
Defence QC Clerk (uncredited)
Acting
Max Faulkner
Radio Officer Andrews (uncredited)
Acting
Guy Standeven
Ships Steward (uncredited)
Acting
John Tatham
Courtroom Spectator (uncredited)
Acting