A boy breaks out in spots but is it chicken pox or small pox as Finlay fears? Dr Cameron fears the worst for a young man who's been having dizzy spells. Mistress Niven meddles again. A local disaster brings out the best in the medics of Tannochbrae.
The final episode of the first series sees Alan's erstwhile girlfriend Mary come to an important decision about her future. Dr Cameron calls on two elderly spinsters who haven't spoken to each other in 15 years. He causes Alan and Janet great concern when he comes down with pneumonia. There's an early role for Jane Asher as a teenager with an abusive stepfather.