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) is a widow after the death of her husband, Arthur.) With the amount of screen time to fill, the series quickly became much more of an ensemble show, developing all the characters considerably. In particular, the role of Tristan was significantly increased. This was partly because Christopher Timothy was injured in a car accident on Boxing Day 1977 during a fortnight break between the recording of "Out of Practice" and "Nothing Like Experience" in the first series. As a result, the actor was largely restricted to studio scenes, which meant that all the scenes involving location filming be rewritten and