The Peterville Diamond

Anne Crawford

Teri Mortimer

Donald Stewart

Charles Mortimer

Renée Houston

Lady Margaret

Oliver Wakefield

Baron Redburn

Charles Heslop

Dilfallow

William Hartnell

Joseph (as Bill Hartnell)

Felix Aylmer

The President

Charles Victor

Dan

Joss Ambler

Police Chief

Paul Sheridan

Luis

Jeremy Hawk

Pierre

Julian Somers

Andre

Rosamund Greenwood

Miss Geach

Billy Holland

First Detective Inspector

Noel Dainton

Second Detective Inspector

Leo de Pokorny

Receptionist

Jack Beaver

Music Director

George Blackwell

Special Effects

Terence Fisher

Editor

Ladislas Fodor

Theatre Play

Brock Williams

Adaptation, Screenplay

Walter Forde

Director

Basil Emmott

Director of Photography

Gordon Wellesley

Adaptation, Screenplay

Norman G. Arnold

Art Direction

Cecil Thornton

Sound

Ernest A. Royls

Sound

Henry Harris

Special Effects