Mr. Sardonicus

Ronald Lewis

Sir Robert Cargrave

Audrey Dalton

Maude Sardonicus

Guy Rolfe

Baron Sardonicus

Oskar Homolka

Krull

Vladimir Sokoloff

Henryk Toleslawski

Erika Peters

Elenka

Lorna Hanson

Anna

Constance Cavendish

Mrs. Higgins (uncredited)

James Forrest

Geoffery Wainwright (uncredited)

Tina Woodward

The Girl (uncredited)

Mavis Neal Palmer

Head Nurse (uncredited)

Charles H. Radilak

Stationmaster (uncredited)