The Diamond Wizard

Dennis O'Keefe

Joe Dennison

Margaret Sheridan

Marline Miller

Philip Friend

Insp. McClaren

Alan Wheatley

Thompson Blake

Francis de Wolff

Yeo

Gudrun Ure

Sgt. Smith

Paul Hardtmuth

Dr. Eric Miller

Colin Tapley

Sir Stafford Beach

Michael Balfour

Hoxie

Cyril Chamberlain

Castle

Paul Carpenter

Mickey Sweeney (uncredited)

Eric Berry

Hunziger

Seymour Green

Lascelles