John Ireland (46)

John Hunter

Robert Ayres (45)

Walter Allen

Robert Cawdron (38)

Saxon

Robert Raglan (51)

The Captain

Graham Ashley (33)

Det. Sgt. Jameson

Frank Thornton (39)

Long

Richard Shaw (40)

Henchman (uncredited)

Reginald Marsh (34)

Inspector Martin

Michael Collins (38)

Fire Chief (uncredited)

Barrie Ingham (26)

Petrie

Ann Hanslip (26)

Walter Allen's Secretary / Betty Fuller

Margaretta Scott (48)

Mrs. Osborne

Michael Balfour (42)

Harry / Freddy

Anton Rodgers (27)

Barman

Philip Latham (31)

Cooke

Ballard Berkeley (56)

Mansion / Jefford / Harry Tyler

Valentine Dyall (52)

Inspector Kellogg

Francis de Wolff (47)

Gormley

John Bennett (32)

Blake

Peter Illing (61)

Police Colonel Zodiacol

Gerard Heinz (56)

Doctor Serafin

Rosemary Dorken (29)

Laura Desmond