Heartbeat: School of Hard Knocks

No-nonsense teacher Jim Osgood uses his experience of the Territorial Army to impose strict discipline at Ashfordly School, but he goes too far with schoolboy troublemaker Gary Bell and puts him in hospital. Determined to get revenge, the youngster breaks into Osgood's office and steals his gun, leaving Mason with little time to avert a tragedy. Joe McFadden and Lisa Kay star