Cheryl faces one of her trickiest operations yet - removing a grapefruit-sized lump from an elderly jack russell. Meanwhile, Rory's patient, Doris the chicken, gets herself into a bit of a flap and Cat the vet is on the hunt for some missing underpants - inside a King Charles spaniel.

It's a first for Cheryl when she performs an extraordinary operation on a 16-year-old goldfish called Baraka. Vet Cat gets a visit from Scout, a nervous greyhound with a poorly paw. James helps Jack the cat, whose waistline is playing havoc with his aching bones.