Graeme Hall tries to help the owners of Bella the collie in Sheffield, whose aggression has become so extreme that people can no longer visit the house and the family cannot take the pet out in public. Graeme also meets Toby, a stroppy basset hound that enjoys sitting on the kitchen counter, and Dave, the French bulldog with a penchant for eating its own droppings.

Trainer Graeme Hall tries to solve dog behavioural problems, using his experience to find quick but long-lasting solutions. He meets Allana, whose two Labradors Teddy and Fudge pull her along at break-neck speed when out walking. He then visits Peggy, a cross-breed with a penchant for escaping, no matter how much her owners try to keep her penned in. Finally, Graeme heads to Blackpool, where Stanley the terrier has been struggling ever since his best friend Sweep died.

Trainer Graeme Hall tries to solve more dog behavioural problems, visiting a family in East Sussex struggling with rescue puppy Diego, a Rottweiler/Rhodesian ridgeback cross. In Cambridgeshire, cocker spaniel Doug's relentless thievery is destroying any chance of a peaceful retirement for owners Julie and Mark, while Graeme's third stop is in Derby, where he meets two miniature schnauzers known locally as the Krays.

Master dog trainer Graeme Hall finds long lasting solutions for dogs with problems. They include Butty, who is bullying the female members of his household, and Pixie, who howls like a banshee the moment she sees another dog. Cameras also follow Lucy, who will stay in the park for hours to raid picnics.

Graeme Hall continues to find solutions for dogs with problems. After a break-up, Hampshire woman Rebecca leaned on her Manchester terrier Marney for support. But now Marney will not let anyone new into her owner's life. In London, Jasper and Alexis cannot live a normal life because their Irish terrier Albert guards the front door like a bouncer.

Graeme Hall meets three more troublesome pets, including Dolly, a Jack Russell/pug cross in South Wales. He advises its owner, Laura, on how to stop the 20-month-old canine from ruling the roost. Last in the series.