Guest Stars Jane Seymour as Rachel Argyle Stephanie Leonidas as Hester Argyle Burn Gorman as Jacko Argyle Camille Coduri as Mrs. Lindsay Richard Armitage as Philip Durrant Andrea Lowe as Maureen Gugu Mbatha-Raw as Tina Argyle Reece Shearsmith as Insp. Huish Juliet Stevenson as Gwenda Vaughn Pippa Haywood as Mrs. Price Alison Steadman as Kirsten Lindstrom Denis Lawson as Leo Argyle Tom Riley as Bobby Argyle Julian Rhind-Tutt as Dr. Arthur Calgary Bryan Dick as Micky Argyle Michael Feast as John Croker Lisa Stansfield as Mary Durrant Carl Isherwood as Scientist James Hurran as Cyril Price