DOOMWATCH (1972, UK, 92m, 12) **½ Mystery, Sci-Fi, Thriller dist. Tigon Film Distributors (UK), AVCO Embassy Pictures (USA); pr co. Tigon British Film Productions; d. Peter Sasdy; w. Clive Exton (based on the TV series created by Kit Pedler & Gerry Davis); pr. Tony Tenser; ph. Kenneth Talbot (Technicolor | 1.85:1); m. John Scott; ed….