Guest Stars Philippa Urquhart as Susan Oliver Ford Davies as Dept. Assist. Commissioner Gradley Pete Postlethwaite as Jack Frost David Gillies as P.C. Thomas Mike Savage as Sgt. Hissink Carole Bollard as W.P.C. Wilkins Patrick Moore as Garfield Jill Simcox as Miss Russell Stephen Lawrence as Det. Sgt. Hunt Judith Bruce as Babs Raymond Brody as Franco John Golightly as Det. Insp. Howitt Terence Budd as P.C. Lyall Jean Leppard as Jean Grey Tommy Wright as Straub Ian Brimble as Reg Grey Uncredited Norman Hartley as Commissionaire
