Brian Sinclair (veterinary surgeon) Ministry of Agriculture's Sterility Advisory unit, rising to become head of the Veterinary Investigation Centre in Leeds. He was the model for the character 'Tristan Farnon' in Wight's semi-autobiographical novels, which were later adapted to the big screen in two films, and television under the name "All Creatures Great and Small". The fictional Tristan was portrayed as a charming rogue who was still studying veterinary medicine in the early books, constantly having to re-take examinations because of his lack of application, often to be found in the pub, and subject to tirades from his bombastic elder brother Siegfried. Unlike his
All Creatures Great and Small (TV series) stories—usually a story thread centred on James, and a second centred on Siegfried or Tristan. The continuity of the show followed the general arc of the books: James' arrival at Darrowby in 1937, his growing experience as a vet, his humorous attempts at romance with Helen, and their eventual marriage. The programme ended in 1980 at the stage where the characters were drawn into the Second World War, the final exterior shots broadcast filmed during the winter of 1979. This completed the adaptation of all the novels which Alf Wight had written up to that point. Two 90-minute Christmas Specials