Part one of two. A priest is brutally beaten and stabbed to death on an east London estate, where bad feeling between residents and police threatens to undermine the investigation. Suspicion falls on local boxing protege Jimmy Bannerman, but progress is hampered when Doug and Clare demonstrate very different attitudes to the brutal competitiveness of the sport. However, a vicious attack on a fellow detective forces them to form a united front. Boxer-turned-actor Gary Stretch stars as Bannerman's…