Donald Pleasence

~ as ~

Dr. Hawley Harvey Crippen

Coral Browne

~ as ~

Belle Crippen

Samantha Eggar

~ as ~

Ethel Le Neve

Donald Wolfit

~ as ~

R.D. Muir (as Sir Donald Wolfit)

James Robertson Justice

~ as ~

Captain McKenzie

Geoffrey Toone

~ as ~

Mr. Tobin

Douglas Bradley-Smith

~ as ~

Dr. Pepper

Olga Lindo

~ as ~

Mrs. Clara Arditti

Elspeth March

~ as ~

Mrs. Jackson

Paul Carpenter

~ as ~

Bruce Martin