Irate husband Phil Pratt accuses Dr. Ellingham of killing his wife Helen when he comes to their house to treat her. Then a horrific accident on the farm leaves Mr. Pratt desperately needing the doctor to save his life. Joan finds him trapped under a tractor, where he has been all night. A new teacher at Portwenn primary school, Tricia Soames, has sore hands. The doctor soon realizes that Tricia is showing all the signs of obsessive compulsive disorder. Meanwhile, things are looking up for PC Mylow on the romance front. Julie invites him to her house for coffee. And he doesn't leave until the following morning, looking rather disheveled, but with a smile on his face.