When London Sleeps

Harold French

Tommy Blythe

Francis L. Sullivan

Rodney Haines

Rène Ray

Mary

A. Bromley Davenport

Colonel Graham

Alexander Field

Sam

Diana Beaumont

Hilda

Ben Field

Lamberti

Herbert Lomas

Pollard

David Butler

Doctor

Barbara Everest

Madame Lamberti

James Knight

Garnett

Harry Adnes

Jerry Balvern

Henry B. Longhurst

Inspector Bradley

Sam Wilkinson

Guy Renton