Quentin Lawrence Director Peter Cushing Harry Fordyce Actor Andre Morell Colonel Gore Hepburn Actor Richard Vernon Pearson Actor Norman Bird Arthur Sanderson Actor Kevin Stoney Detective Inspector Bill Mason Actor Barry Lowe Peter Harvill Actor Edith Sharpe Miss Pringle Actor Lois Daine Sally Actor David T. Chantler Screenwriter Lewis Greifer Screenwriter Michael Carreras Executive Producer Arthur Grant Cinematographer Eric Boyd-Perkins Film Editing Wilfred Josephs Original Music Bernard Robinson Production Design Don Mingaye Art Director Stuart Lyons Casting