Guest Stars James Grout as Chief Superintendent Strange Amanda Hillwood as Doctor Grayling Russell Lana Morris as Miss Tree Beatie Edney as Deborah Burns Michael Aldridge as Arthur Drysdale Nathan Lewis as Young Man Nikki Brooks as Young Woman Jackie Buchanan as German Woman Jill Johnson as Mrs. Burns Philip Bloomfield as Sam Pauline Munro as Dentist Barry Foster as Sir Alexander Reece Laura Sadler as Sabena Gertan Klauber as German Man Mark Tandy as Mr. Collins Michael Percival as Landlord Susannah Hitching as Girl on Boat Kevin McMonagle as Geoff Tenniel Evans as Dr. David Kerridge Bert Parnaby as Ben Albert Welling as Chris Stoneley Sian Thomas as Carol Sharp Uncredited Colin Dexter as Man walking along canal bank in opening scene
