Donald Pleasence
Dr. Hawley Harvey Crippen
Coral Browne
Belle Crippen
Samantha Eggar
Ethel Le Neve
Donald Wolfit
R.D. Muir (as Sir Donald Wolfit)
James Robertson Justice
Captain McKenzie
Geoffrey Toone
Mr. Tobin
?
Douglas Bradley-Smith
Dr. Pepper
Olga Lindo
Mrs. Clara Arditti
?
Elspeth March
Mrs. Jackson
Paul Carpenter
Bruce Martin