The Doomwatch film was made by Tigon British, a small company that were trying to become players in the Anglo-Horror arena and imitate the success of Hammer Films. They made a handful minor horror entries including Curse of the Crimson Altar (1969), Blood on Satans Claw (1971) and The Beast in the Cellar (1970). With Doomwatch, Tigon employed director Peter Sasdy who had made a distinctive impression at Hammer with Taste the Blood of Dracula (1970), Countess Dracula (1970) and Hands of the Ripper (1971), among others.
Doomwatch is not a bad film. Its greatest advantage comes in a credible and scientifically grounded script and a certain topicality of interest regarding then emerging environmental concerns. The problem would seem to be that this is flying in the face of the audience that the film was sold to. Tigon tried to market Doomwatch as a horror film and ended up losing out because it had no monsters and was far too wordy and not scary enough. The climax, for example, tries to push the story into being a horror film by creating a siege with the hero fighting off attacking acromegaly sufferers but Doomwatch is not a horror type film and this feels forced.
Seen outside of that, Doomwatch is a nice little film. Not too many people ever seem to rate it that highly but it is a decent effort. In fact, it is arguably the best of director Peter Sasdys films, at least stylistically. Sasdy develops the paranoid parochial atmosphere with a reasonable degree of effect. There is some excellent photography particularly the underwater scenes and location work. In particular, there is a beautiful shot focused through a glass of water with a gun-toting man seen distorted as he runs along a cliff-top.
Doomwatch was subsequently revived in a tv movie Doomwatch: Winter Angel (1999).
Peter Sasdys other genre outings were: Taste the Blood of Dracula (1970), Countess Dracula (1970), Hands of the Ripper (1971) about Jack the Rippers daughter, the immortality syndicate film Nothing But the Night (1972), the Nigel Kneale ghost story tv play The Stone Tape (1972), the Satanic impregnation film The Devil Within Her/I Dont Want to Be Born (1975) and the proto-Virtual Reality film Welcome to Blood City (1977).