Adaptations of mystery stories written by Sir Arthur Conan Doyle's contemporary rivals in the genre.
Director:
Cast: Peter Vaughan, Peter Barkworth, Douglas Wilmer, Ronald Hines, Cyd Hayman, Derek Smith, Kenneth Colley, Petronella Barker, John Nettleton, Charles Lloyd Pack, James Cairncross, Paul Whitsun-Jones, Robert Hartley, Edward Dentith, Clifford Parrish, Michael Cashman, John Dawson, John Gatrell