DOC MARTIN: Perish Together as Fools
Doc Martin is shocked to find Louisa and aunt Joan knocking at his door hours before his office has opened. Louisa has had a medical scare and wants Martin's reassurance that everything is fine with the pregnancy.
P.C. Penhale, still officially the world's worst policeman, gets an unexpected visit from his older brother Sam. Martin notices that Sam has some problems with memory and coordination, and realizes that there's a slight possibility that he has a rare genetic disease.