The Diamond Wizard

Dennis O'Keefe as Joe Dennison Alan Wheatley as Thompson Blake Gudrun Ure as Sgt. Smith Colin Tapley as Sir Stafford Beach Margaret Sheridan as Marline Miller Philip Friend as Insp. McClaren Francis de Wolff as Yeo Paul Hardtmuth as Dr. Eric Miller Cyril Chamberlain as Castle

Jim O'Connolly Assistant Director Dennis O'Keefe Director Montgomery Tully Director