In today's episode, Paul's in puppy heaven as he meets a litter of 10 adorable newborn Staffie cross pups and their mum Luna. Paul has the enviable task of helping to socialise these little beauties who, like their mum, have all been given celestial names. But before Paul can help ween them, events take a turn when Aries, his favourite, worryingly falls sick along with her siblings Mars and Saturn. Paul rushes to Intensive Care to help nurse the poorly pups - but as they're so small and vulnerable, will they be strong enough to pull through?

And not content with just 10 puppies, Paul also tries to get to grips with fiesty Collie pup Tilly who's just arrived into Lost and Found. But the energetic tyke proves to be a real handful so Paul enlists the help of 13-year dog lover Paige, who's at Battersea with the Make-A-Wish Foundation, to help get Tilly on the straight and narrow. And it's not long before Paige is showing up Paul by getting Tilly under control and teaching her a few basic commands - is she going to put Paul out of a job?!

And not wanting to forget the golden oldies, Paul also meets decepit pensioner Tiny the 16-year old Yorkie. This old timer might be doddery on his pins, but he's still got plenty of life left in him and Paul quickly for the charms of this cantankerous senior citizen. But the medical team are worried his arthirtis might be getting too much for him and not only that, who is really going to want to rehome such an old dog?

It's the final episode of the series, and today's dogs are all in need of an O'Grady shoulder to lean on. First up Paul meets the implausibly cute Dudley, an Old English Sheepdog who is just six-weeks old and looks like a fluffy teddy bear. Old English Sheepdogs rarely come into Battersea, but Dudley's an exception because the little guy is profoundly deaf, which means puppy training is proving tricky. So Paul sets to work trying to teach Dudley doggie sign language, but it proves not to be the easiest assignment as the pup is more interested in playing than learning.