Guest Stars Caroline O'Neill as Win Thursday Abigail Thaw as Dorothea Frazil Sara Vickers as Joan Thursday Matt Walker as Ray Morton Joanna Horton as Selina Berger Natalie Burt as Alison Laxman Christopher Coghill as Seth Chattox Sheila Hancock as Dowsable Chattox Adam Levy as Elliott Blake Alex Wyndham as Dr. Jon Levin Grahame Fox as Zebulon Sadler Jane Whittenshaw as Morag Morrison Sam Hoare as Dr. Tristan Berger Emily Forbes as Ros Levin Sam Redford as Sgt. Troy Martin Michael Pennington as Professor Donald Bagley Phillip Edgerley as Quizmaster Alex Mann as Dr. Matthew Laxman Raj Paul as Doctor Simon Meacock as Nigel Warren