The Diamond Wizard

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

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