All Creatures Great & Small (Büyük Küçük Tüm Hayvanlar) 4. Sezon 4. Bölüm (By the Book)

James and Helen are keeping a secret, and following a visit to the Crabtree’s Farm, Carmody is challenged with learning how to be a vet outside of his books. The new farmers have a worrying illness amongst their herd and James wants to help them in any way he can.