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 (franchise) story within the ongoing narrative of Herriot's life, this facilitated their adaptation for a television series by producer Bill Sellars. The series stars Christopher Timothy as James Herriot and Robert Hardy as Siegfried Farnon, and it had two runs: the original (1978 to 1980, based directly on Herriot's books) was for three series; the second (1988 to 1990, filmed with original scripts) for four. Series 4 saw the introduction of new vet, Calum Buchanan (John McGlynn), based on Herriot's real-life assistant Brian Nettleton. A total of ninety episodes were broadcast. "Young James Herriot" is a three-part BBC television series based