Martin isn't happy when Pauline starts to interfere with his work.

Bert decides to give up plumbing and open a restaurant of Doc's advise. When several causes of food poisoning are reported on the same night as the restaurant opens the doc tries to find out what has really caused them.

Louisa finds her new neighbours irritating. Martin and Louisa find their romantic meal ruined by Anthony and Terri Oakwood's sudden arrival.

Mrs Wilson, the hypochondriac owner of the Wilson hotel, forces her attentions on a very indifferent Martin, which makes Louisa jealous anyway. Joan dates a much younger man than her, much to Martin's surprise.

Martin goes out on his first proper date with Louisa. Martin has to work fast to save the life of one of Louisa's friends. Louisa is grateful but is surprised when Martin suddenly proposes.

As an excited Portwenn digests the news that Martin and Louisa are engaged, it's business as usual for the doctor. Beth Sawle's knee wound is not responding to the treatment he's prescribed, and when Martin visits the remote cottage where she lives with her strange sister Janet, he makes a disturbing discovery. Meanwhile, Bert's restaurant is in financial trouble, prompting son Al to take decisive action.

It's Martin's wedding day and he manages to offend the vicar who is due to conduct the ceremony by suggesting he has a drink problem. When they struggle over a bottle of whisky, the vicar falls over, fracturing his pelvis and Martin has to find a replacement. Pauline suggests the former vicar of Delabole, who strikes a deal. He will conduct the wedding ceremony if Martin will examine his sick pig. Bert and Al are putting the finishing touches to the wedding banquet when disaster strikes. Last in the series.