Craddock is driven off the road by local vet Josh Roberts, who has developed a drinking problem following his wife's death. As Roberts is the only vet in Aidensfield, Craddock lets him off with a warning and orders Mike to keep watch on him. However, Roberts is enraged by the officer's interference and begins terrorizing the Ashfordly sergeant. Meanwhile, Greengrass opens a stall outside a country fair and leaves David to do all the work whilst he collects all the profit. But disaster strikes when the pair sell flee-infested fur rugs around the village. Elsewhere, Bellamy falls in love with Sue Driscoll, the Ashfordly station's new secretary, whilst a lost dog attaches itself to Blaketon.