Al discovers that Bert may not be his father and goes in search of the truth. An odd family with a lack of hygiene and a passion for taxidermy contract salmonella poisoning, but Martin has difficulty convincing them to accept treatment. PC Mylow's bossy sister arrives in Portwenn and sets up a herbalist business in his flat. However, when her remedies increase his patients' many ailments the doctor is forced to take action.
Make an appointment with the brilliant but socially awkward and neurotic Doc Martin. When Martin develops an aversion to blood, he abandons his career as a celebrated London surgeon and becomes the only doctor in a sleepy small town where his tactless manner soon has the whole town in an uproar.
Doc Martin - Blood is Thicker Synopsis and Schedule