Scotland Yard Investigator

C. Aubrey Smith

James Collison

Erich von Stroheim

Carl Hoffmeyer

Stephanie Bachelor

Toni Collison

Forrester Harvey

Sam Todworthy

Doris Lloyd

Emma Todworthy

Richard Fraser

Robert Cartwright

Eva Moore

Mary Collison

Victor Varconi

Jules

Emil Rameau

Professor Renault

Frederick Worlock

John Brent