Just an errata and clarification for some of the above:
This little gem of a film is now under the ownership of Renown Films and is shown periodically on Talking Pictures TV (TPTV). The film was produced in 1962 as is confirmed by the titles (MCMLXII). It was released in 1963,but not well received, despite the presence of John Gregson who was a well known TV and film actor who often played the role of a police detective. However it was re-released in 1965, after Robert Shaw had appeared as the assassin Donald Grant in the second James Bond film From Russia with Love (1963). William Hartnel, who would subsequently play the first Dr. Who (1963 - 1966) also appears in a cameo as Freddie Maddox (frequently misspelled as Freddy), the father of George Marlowe (Maddox) and, with his wife Masie (Dorothy) Maddox are proprietors of The Golliwog Club.
Marlowe is not whistling the theme to Z-cars as he constructs the 'golliwog bomb', but rather is whistling the old English nursery rhyme 'Pop Goes The Weasel' and even sings a couple of lines. He is whistling an unintelligible song as he enters Abots Mead and walks up the stairs - as he approaches the second floor landing whistling can be heard in the background but it is evident from the shot that he is not whistling. The last segment as walks across the landing to the nursery does,however, resemble the theme tune of Z-cars.
The house from which Jonathan Chester is taken by the kidnapper is cited as being 14 Winnington Road, Hampstead, London N2. Whilst it is built in the neo-Georgian style of many of the larger houses towards the Highgate end of Winnington Road, it is certainly not the house which now stands there. It was in keeping with the area which wealthy financiers such as Anthony Chester (Alec Clunes) lived in the 50s and 60s.
The house at which Jonathan Chester (Piers Bishop) was kept hostage is portrayed as 'Abbots Mead' in Wimbledon, described by the estate agent, Mr. Tamplin (Frank Hawkins) as a detached house on three floors. Whilst the Wolseley police car is certainly seen driving at speed down the A3 expressway (now the Kingston Bypass) the actual location has not been verified.
