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