Cast
Donald Pleasence
Dr. Hawley Harvey Crippen
Coral Browne
Belle Crippen
Olga Lindo
Mrs. Clara Arditti
Paul Carpenter
Bruce Martin
Edward Underdown
The Governor
Donald Wolfit
R.D. Muir (as Sir Donald Wolfit)
Geoffrey Toone
Mr. Tobin
John Arnatt
Chief Inspector Dew
Basil Henson
Mr. Arditti
Totti Truman Taylor
Miss Curnow
Max Faulkner
Radio Officer Andrews (uncredited)
Samantha Eggar
Ethel Le Neve
James Robertson Justice
Captain McKenzie
Oliver Johnston
Lord Chief Justice
Hamilton Dyce
Dr. Rogers
Guy Standeven
Ships Steward (uncredited)