Doc Martin (2004)

S3E6 Nowt So Queer

The news of Martin and Louisa's engagement sends ripples of excitement through Portwenn, but for the doctor, it's just another day at work. He finds that Beth Sawle's knee injury isn't healing as expected, which leads him to her secluded home shared with her eccentric sister, where he uncovers a troubling secret. Meanwhile, with Bert's eatery facing financial woes, his son Al steps up to implement a bold plan to save the family business.