Just when James is settling into life in the Dales, Siegfried’s younger brother Tristan arrives bringing his own unique brand of chaos to Skeldale House. Recently returned from Edinburgh Veterinary college Tristan announces he’s just passed his final exams. Siegfried is delighted and instructs James to take Tristan on his rounds to put his theory into practice. James obliges but starts to feel threatened by the new arrival when Tristan goes out of his way to impress his brother.