Terence Morgan (Clostin), Patricia Marmont (Anne), Reginald Beckwith (Peebles), Bernard Lee (Hurst), John Stuart (Dr Bowman), John Howlett (Sergeant), and Rosemary Davis (Waitress).
Ric Hutton (John Clostin), Anne Haddy (Mrs Clostin), Leonard Teale (Detective-Inspector Hurst), James Workman (Dr Bowman), Richard Parry (James Peebles), Jack Ford (Sergeant), and Carolyn Keely (Waitress).