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