Mike is reacting badly to Tricia's death and has an altercation with an underage drinker in the pub. The boy hits him but is let off by the magistrate - who turns out to be his father.

Bellamy is smitten with Alice, the victim of a handbag snatch. Merton and the others are trying to track some valuable porcelain figures stolen in Whitby when a similar theft occurs at Mr Osbourne's.

Lord Ashfordly is concerned about falling royalties from High Rigg Quarry and asks Blaketon to investigate. The police are concerned about a quantity of explosives which have gone missing from the quarry just before a visit by the defence minister.

Vernon and David are travelling in a tanker which overturns spilling its load. Vernon is taken to hospital with memory loss and David claims not to know what they were carrying. The police discover that the tanker has false number plates and its contents are contaminating the water supply.