[15] "Straight off the bat with our on-set vet adviser Andy Barrett, we were up close and personal with horses, sheep, kind of going through the procedures and things that we would be doing.

"Sinclair's real-life behaviour was much more eccentric (he once discharged a shotgun during a dinner party to let his guests know it was time to leave)".

[19] Significant changes were made from the source material (in the previous television series and the memoir), such as Siegfried Farnon being shown as a heartbroken widower and a dramatically increased role for Mrs Hall, who has been reimagined as a young, live-in housekeeper and a "slightly warmer figure" than in the novels.

[22] "Straight off the bat with our on-set vet adviser Andy Barrett, we were up close and personal with horses, sheep, kind of going through the procedures and things that we would be doing", Ralph said.

Using the stethoscope on the cow's heart, then lungs, then stomach..."[16] "I have huge respect for ... Andy Barrett and the animal handlers who worked on the show", Ralph told an interviewer.

[23] In interviews after the filming of series three, Ralph said that the crew had experienced problems with getting cooperation from cats: one bolted off the set while he was trying to examine it.

[26][27][28] The BBC series, which was broadcast between 1978 and 1990, had been filmed in the northern part of the Dales (Wensleydale and Swaledale), with the village Askrigg used for the fictional Darrowby.

[29] Neither the BBC nor the new series was filmed in Thirsk (where the actual vet, Alf Wight, practised), because it had become too large for the small-town feel that the producers wanted.

The church featured in the Christmas special is St Wilfrid's at Burnsall, near Grassington, the crossroads are "on the roads above Pateley Bridge" in Nidderdale and the farm is in Airton.

The production company made appeals for historic artefacts and props, as they prepared to film the next chapters of James Herriot's life.

[42] Executive producer Colin Callender said in early 2021 that filming had been postponed due to restrictions necessitated by the COVID-19 pandemic.

[48] Other new cast members include Dorothy Atkinson as Diana Brompton, a possible love interest for Siegfried,[49] and James Fleet as Colonel Hubert Merrick, a farmer who appeared in the Herriot book.

Tristan is finally fully qualified, James starts a new phase of life after marrying Helen and becomes a partner in the business; the practice gets involved in the new bovine tuberculosis testing programme.

Veterinary surgeons work in a "protected profession", so are not required to serve, but in the final episode James decides to enlist.

[60] Filming commenced on 3 March 2023 and reports in April indicated that the cast and crew had been seen in Grassington and in the North Yorkshire town of Thirsk.

Mrs Hall and Helen's friendship blossoms as they look to the future and new trainee veterinary student Richard Carmody arrives, causing complications in the house.Set to pick-up where it left off, during World War II, the series, which began filming in March 2024, is due to show more of James's time in the RAF as well as the trials and tribulations he and Helen will encounter bringing up their baby boy.

[66] The entire ensemble cast, including the newest regulars James Anthony-Rose and Callum Woodhouse who did not appear in the last series, as well as the show's stars Nicholas Ralph and Rachel Shenton are due to reprise their roles.

Mrs Hall volunteers as an air raid warden, against the objections of Mr Bosworth, who relents after being reminded of everything she did while serving in the Wrens during World War I. Carmody introduces a triage system that allows him to start supporting the pet clinic.

Carmody impresses Siegfried by correctly diagnosing what is happening – the cat is accidentally ingesting morphine by licking the spoon his owner uses to take her prescribed medication.

[83] The Daily Telegraph's Michael Hogan gave the first series four out of five, and commented "Revisiting the world of All Creatures Great and Small felt like meeting old friends.

Any viewers missing the classic triumvirate of Robert Hardy, Christopher Timothy and Peter Davison were surely converted by this well-crafted opener, confidently directed by Downton Abbey alumnus Brian Percival".

Its chief TV critic Caroline Framke wrote that All Creatures Great and Small "finds key ways to distinguish itself from depictions past, especially as it makes the most of a handsome budget and embraces a welcome, earnest warmth in its storytelling"; she added that the update made "a beloved property worthwhile".

[85] NBC News praised the series as "pastoral perfection", commenting that the show was "never meant to be pandemic escapism... but it's hard to think of a better moment for something as simple and charming".

[86] The Los Angeles Times's Mary McNamara disputed the apparent consensus of the show as being a necessary sanctuary in the pandemic and calling it "a disappointment" because it deviated too much from the source material.