Including Jon Finch (Det. Insp. Lomax), Judy Geeson (Helen), Christopher Lee (Dr Stephen Hayward), Tony Beckley (Sgt. Greene), Dilys Hamlett (Julia Hayward), Jane Merrow (Mary Dawson), Colin Jeavons (Bob Dawson), David Trevena (Johnson), Adrian Cairns (Morgan), Daphne Neville (Nurse Fisher), Hugh Smith-Marriott (Dr Chapman), Hubert Tucker (Ronalds), and David Langford (Gray).
