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