The Mystery of Mr. X

as

Nicholas Revel

as

Jane Frensham

as

Police Superintendent Connor

as

Sir Christopher Marche

as

Sir Herbert Frensham

as

Joe Palmer

as

Hutchinson

as

Mr. X

as

Adaptation

as

Director

as

Novel

as

Screenplay

as

Art Direction

as

Sound Director

as

Editor

as

Music

as

Costume Design

as

Producer

as

Additional Dialogue

as

Director of Photography