Interference (The Play Pictorial volume 50) The cast list is accompanied by a description of the plot and photographs of the actors in character and in scenes from the play. In particular Moyna MacGill as Faith Marlay, Gerald Du Maurier as Sir John Marlay, Betty Moore as Barbara Marlay, Basil Loder as Douglas Helder, Herbert Marshall as Philip Voaze, Miss Hilda Moore as Deborah Kane, Frank Lawton as Fred, Spencer Trevor as Dr. Puttock and Marjory Clark as Mrs Rooke. 29.1.1927