Dawn and Don dote on their rescue dog Buddy, but even they can't ignore the threat he poses to any delivery driver who comes to the door. He's bitten two and now even locked doors can't restrain him. Expert Jo takes them all on a crash-course to see if they can fix their communication problem. Great Dane puppy Sid needs to learn some manners on the lead. His owners Mark and Angela are overpowered and out of ideas so they seek advice on how to get their 'big baby' under control. 

Mum and daughter Kristie and Kirsten seek advice from expert Jo on preventing their six basset hounds barking in unison, while barber Josh contacts trainers Kamal and Sean to help him combat his French bulldog Ace's separation anxiety. When Charlotte moved back home with her parents after a break-up, Dixie the Dobermann came too. However, Dixie's overpowering lunging out on the lead means that no one in the family will walk her. Now her parents have issued an ultimatum - either Charlotte steps up for her dog or the dog has to go.

Jo and Steve are at loggerheads over their rescue dog Theo. According to Steve, Theo's perfect exactly as he is and should be treated as such. But Jo struggles with Theo's intense reactions to strangers and apparent obsession with destroying balls. Can trainer Kamal help these two owners get things squared for the good of their beloved dog? French bulldog Benny is another obsessed pup. Benny's eyes darken as he goes into attack mode whenever cleaning products come out. What's troubling Benny? And what's made cavapoo Parker so fearful?

Rujbinder and Jash's lockdown cockapoo Sunny's incessant barking has left the family feeling isolated. Trainer Jo thinks she knows what Sunny is trying to say, but will the first-time dog owners be able to speak the same language? Maggie the collie cross is the most amazing sidekick to Carrie and Peter's son, Seth, who was born with cerebral palsy. She's a much-loved member of the family... inside the house. Outside the house, however, Maggie pulls on the lead 'like a ruddy train'. Can Victoria teach Maggie to slow down? And Mick and James are desperate to give rescue dog Charlie the life he deserves. If only they could leave Charlie for more than five minutes at a time. 

Although he may look cute, fluffball Dougie has been branded a danger to society by local law enforcement. If he bites again, the authorities have threatened to step in. Can Libby and Tom turn things around? Chaos follows St Bernards Bodie and Bailey wherever they go - destroyers of vases, and chasers of cats, squirrels and neighbours. Trainers Sean and Kamal want to help Sam get some control over her fluffy demolition squad. And Michelle hoped an English sheepdog puppy would comfort her widowed dad. But relations between man and pooch have broken down. Trainer Victoria has an idea of how to mend the relationship.

A team of expert trainers, along with dog-dad-of-two Nick Grimshaw, come together to take on the nation's naughtiest dogs... and their humans. Tim and Chelsey have been showing their love for bulldog Bobby through food. Trouble is, now he can't walk. Or is it more a matter of won't walk? Victoria doesn't sugar-coat her conclusions. Older dog Harley and puppy Jack can't stand the sight of each other, and owners Lynn and Dean are stuck in the middle. With the serious risk of injury hanging over the family, expert Jo has a challenge on her hands. Meanwhile, first-time dog owner Natalie is struggling with nervous mega-yapper Milo, a miniature dachshund.

A team of expert trainers, and presenter Nick Grimshaw - dog-dad of two - take on the nation's naughtiest dogs... and their humans. Eight-stone puppy Ghost, a Cane Corso mastiff, is striking terror into the heart of the neighbourhood, and his owners. While his guard dog credentials are impeccable, can he be trained to be compatible with family life? Will he even let trainers Sean and Kamal come anywhere near him? And newly-engaged Chelsea and Owen have their hands full with, and their relationship tested by, Chelsea's six chihuahuas and a cavapomchi called Mr Bollinger.