The house used by Ralph Bates & Judy Geeson previously appeared as: 1. the house where most of the film is set The Traitor [1957]; 2. the hotel used by the lovers in The Rough & The Smooth [1959]; 3. the tennis club in School For Scoundrels [1960]; 4. Rod Taylor's training ground in The Liquidator [1965]; 5. the Eatons' house in The Devil Rides Out [1968]; 6. "The Elizabethan Hotel" in The Avengers S7 Episode 20 "Wish You Were Here" [12/2/69]; 7. Paul Kirstner's house in Randall & Hopkirk (Deceased) Episode 7 "Murder Ain't What It Used To Be" [2/11/69]; 8. "Merstham Manor" in Randall & Hopkirk (Deceased) Episode 9 "The House on Haunted Hill" [16/11/69]; 9. garden for croquet in Department S 2/8 The Perfect Operation [26/11/69] and 10. Mrs Howe's house in Randall & Hopkirk (Deceased) Episode 14 "Who Killed Cock Robin?" [21/12/69] and would appear again as: 11. the restaurant visited by Strand in Special Branch S4 Episode 12 "Diversion" [2/5/74]; 12. Green's house in The Professionals 2/5 In The Public Interest [4/11/78] 13. the honeymoon hotel in Hammer House of Mystery & Suspense episode 1 Mark of The Devil [5/9/84].