Fred Francis Director Joan Crawford Dr. Brockton Actor Michael Gough Sam Murdock Actor Bernard Kay Inspector Greenham Actor David Griffin Malcolm Travers Actor Kim Braden Anne Brockton Actor Joe Cornelius Trog Actor John Hamill Cliff Actor Geoffrey Case Bill Actor Thorley Walters Magistrate Actor Jack May Dr. Selbourne Actor Rona Newton-John Reporter (uncredited) Actor Maurice Good Reporter Actor Paul Hansard Dr. Kurtlimer (uncredited) Actor Robert Crewdson Dr. Pierre Duval (uncredited) Actor Robert Hutton Dr. Richard Warren Actor David Warbeck Alan Davis Actor Brian Grellis John Dennis (uncredited) Actor Simon Lack Colonel Vickers Actor Chloe Franks Little Girl Actor Herman Cohen Producer Aben Kandel Screenwriter John Scott Original Music Desmond Dickinson Cinematographer Oswald Hafenrichter Film Editing Maude Spector Casting Geoffrey Tozer Art Director