The fourth series of the show featuring Australian vet Dr Scott Miller, who runs a surgery in south-west London. In the first episode of the new run, Scott deals with a liver disease scare for a celebrity dachshund. There's a miracle recovery for the victim of a horrific car accident. Practice manager Maz's unusual pets need some unexpected treatments. And Scott makes an astounding discovery when he opens up an oversized Maine Coon cat called Chip.