All Creatures Great and Small's Samuel West's kind words to season 5 finale guest star

All Creatures Great and Small is returning to Channel 5 for one more episode where James Herriot (portrayed by Nicholas Ralph) begins behaving unusually while caring for Tricki. As Helen (Rachel Shenton) hurries him to bed, the reins are handed over to Mrs Hall (Anna Madeley) and Mrs Pumphrey (Patricia Hodge).

In the meantime, Siegfried Farnon (Samuel West) seeks assistance from his brother Tristan (Callum Woodhouse) following Carmody's (James Anthony-Rose) departure. Regrettably, their car breaks down, leaving them with no option but to trek home.

Old disagreements resurface as they attempt to determine the best plan of action. Back at Skeldale House, James fluctuates between reality and old memories that haunt him.

Helen is concerned, but the experience brings them closer in unexpected ways. All the while, Mrs Pumphrey finds herself stepping into a new role.

Here's everything you need to know about the guest stars for the final episode of season five, titled Glass Half Full.

Mr Dobson - Jon Furlong

Mr Dobson, the owner of a horse that Siegfried and Tristan visit, has a long-standing friendship with them.

Jon Furlong portrays the farmer and is known for his roles in Welcome to No Man's Land and Ghosts.

Audiences may recognise him as Brother Godwin in The Last Kingdom or as Jelson in the 2024 series Here We Go.

His most recent project was Odd Squad UK, where he played Stephen. He was born in Manchester and has scoliosis of the spine.

Molly Stephens - Olivia Paige Marsh

Olivia Paige Marsh, who plays the role of Molly with her pony for Siegfried and Tristan's attention in the series, is making a notable entrance into mainstream television with "All Creatures". Previously, she has only appeared in a short film entitled "Rented Identity".

Born in December 1999 in Merseyside, Olivia identifies as an LGBTQIA+ actor.

Her esteemed co-star Samuel West took to X, the platform once known as Twitter, to commend her first foray into TV, remarking: "You only get to make your TV debut once."

Celebrating her performance, he added, "We're very glad that the terrific young actor Olivia Paige Marsh @OliviaPMarsh made hers with #AllCreaturesGreatAndSmall."

Gratefully responding to his words, Olivia shared: "Such a joyous experience! Thank you for being so lovely, Sam x".

All Creatures Great and Small continues on Channel 5 at 9pm