All Creatures Great and Small Series Five continues the heart-warming tales of James Herriot, his wife Helen and his volatile but warm-hearted partner, Siegfried Farnon. The period is now the early Fifties, but the Dales are slow to embrace the world of tomorrow. Tristan has left the Ministry of Agriculture to return to the Darrowby practice. Even with Calum on the team, the vets see little of the leisure that the modern age promises.