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) the sixth series), before returning for the majority of the final series. Carol Drinkwater opted not to return to the series. "Bill Sellars was very, very cross with me for leaving. I think he thought I had been ungrateful. I'd given everything I could and I couldn't think where else I could take the role, because there was no more material. I wasn't leaving in any kind of spiteful thing; it had nothing to do with Chris and I, which is, of course, what everyone thought. Our split was all very amicable. Chris and I, and his wife Annie, are