Guest Stars Alun Armstrong as Det Supt Frank Burroughs Keith Allen as Det Supt Alan Horsefell Richard Lynch as PC Peters Dudley Sutton as Deputy Commissioner Sir Harry Streeter Ian Rowlands as PC Pratley Jenny Downham as Jane Whitehouse Alan Devlin as Sir Rex Ferriday (MI6) Clyde Pollitt as Dep Chief Constable Donald Preece Brinley Jenkins as Chief Constable Maurice Probert Gillian Eaton as Maureen Fry Guy Williams as Laurence Payne Mike Hayward as Supt Williams Tom Marshall as Det Insp Bill Senior Robert Blythe as Chief Inspector Price Derek Hutchinson as Sgt. Keeper Roger Brierley as Julian Brind Shirley King as Muriel Dumont (PCA) David Ryall as Sir Cyril Llewellyn (DPP) Martin Troakes as Chief Superintendent Jones Keith Barron as Cmdr Jack Bentham