All Creatures Great and Small (TV series) that be wanted to cast the role. Sellars, instead, asked Timothy if he would accept the role of Tristan Farnon. "I had a wife, I had children, I had a mortgage to pay, and I wasn't working. So I said, 'No. It's Herriot or nothing.'" Timothy put everything on the line. "I got home one night, at about 9 o'clock. My wife was washing up in the kitchen. I walked into the kitchen and she said, without turning round, 'You've got the Herriot part.'" Timothy also stated that, after all of the roles had been cast except that of Herriot,
All Creatures Great and Small (TV series) penchant for sleeping late, failing his exams, and spending too much time chasing women. In the episode "The Prodigal Returns", when Siegfried mistakenly thinks "little brother" is impersonating a client on the other end of the telephone line, a few home truths come out: "Mr Biggins, if you've got it into your head that young Mr Farnon is a veterinary surgeon of any quality whatsoever, let me disabuse you of that idea immediately. He is nothing more than a slothful, drunken, incompetent lecher who will soon be seeking employment elsewhere." Tristan's party piece is a rendition of "The Mad Conductor"