The boys get their hands on back stage passes for some willing helpers to get stuck in at the country's busiest vets, wildlife sanctuaries and animal rescue centres. Their volunteers are up for a massive challenge but they're not all big animal lovers. Will a day on the frontline looking after wounded wildlife and poorly pets change their minds?
Volunteers Quasim and Haroon are in at the deep end as they help hundreds of pongy hedgehogs, assist in a life saving operation and release a deer in a secret wood. Meanwhile Intisar and Shannon go on safari to help Britain's bats and track down five of the UK's native reptiles. Plus, Dick and Dom play chicken with Henrietta the Hen as they try to become assistant vets.
Nawal and Anne get down to business at a marine sanctuary. Will they be able to help an orphaned seal pup return home to the open sea? Sam and Grace muck in and manage a right old mess at the dog rescue centre. And Dick feels his way around a tricky animal assignment but will he get to the bottom of Simba the snake's sniffly health problems?
Olly and Oscar look after wildlife babies, enter a bat tent for a test flight and get to grips with a thirsty fawn. Will Keisha and Mercy end up tongue tied whey they try out donkey dentistry at a sanctuary? And Dom squares up to a massive mute swan that needs his help.
Mya and Sophie head out on the ocean waves on a shark-saving adventure. Robert and Rebecca get tails wagging at a dog rescue centre as they help Joel the labrador through an operation on his bad eye and give Sasha the samoyed a shower. And Dick is feeling gruff as he tries to bath some billy goats.
Chris and Ben play mum to a tiny kitten, but will the pigs prove too pongy when they clean out their poo-filled pen? Natasha and Veronica return a swan to the wild and find a new home for Ugg the seal. Plus, how will Dick scrub up when he goes on an underwater mission to clean some coral?
Madihah and Jack go wild in Somerset as they make a personal pudding delivery to some hungry foxes and move a pair of otters. Katie and Abi help one of the rarest penguins on the planet and are deployed on deep-sea duties with a real-life marine monster. Plus Dom smells trouble as he has to groom gassy Cassie the giant horse.
Zac and Finley are up against it at the wildlife hospital. Can they get some dozy ducklings off dry land and onto the water? Alex and Josh dig in at an animal sanctuary. Can they handle the load when they have to clean up after mucky Mak the Exmoor pony, and will they get Rosie the bulldog jumping her way to freedom? And Dick's a shepherd for the day but can he get sheepdog Dom under control?
Rachel and Kal rehouse some feisty hissing owls, release recovered birds and help give a rescued badger an identification tattoo. Kaiser and Yusuf assist Bailey the dog through some particularly sensitive surgery. And Dom enters a strange world of alien life forms as he gets turtle-y immersed helping out some overgrown and unwanted terrapins.
Leanne and Robert get fully operational in the vet's surgery as they help fix a ferret's rotten bottom and deal with a dog's dodgy ear. Jessica and Stephen try out some horse dentistry and assist with Diamond's sore jaw. Plus there is a fruity challenge for Dom who is cleaning out the pigsty wearing Dick's ace invention - an apple jacket!
Nelson and Dillon grab a goat that needs a pedicure, play hide and seek with some endangered red squirrels and tuck in a dozy dormouse for his winter snooze. Abbie and Shannon sort out some mucky mutts, face a filthy ferret and learn to love dippy dogs. Plus Dom turns waiter and rustles up a fishy dish for some particularly picky penguins.
Ada and Bianca get busy at an animal sanctuary as they scrub up smelly dogs - but will they be able to round up the flighty rescued horses? Elise and Abbie smell a rat at the wildlife trust, but will they get the cold shoulder from Fleck the Arctic fox? And Dick plays chicken with a racing rooster in need of a house relocation.
Scott and Matthew take on a difficult animal first aid assignments. Will the flappy mute swan be too much of a handful? Courtney and Jordan roll up their sleeves and manage a messy pup at a rescue centre. And Dom cannot mask his fear when he comes face-to-face with a giant sea monster.
James and Isaac get in a flap with a bald eagle and give an old dog's toothypegs a polish at the doggy dentist. Chelsie and Kaila fawn over a fawn, get badgered by a badger and set free a fox. And Dick and Dom issue fishy treats to a seal pup in need of plumping up.
Josie and Poppie fix up a swan's leg and get some bats in a flap when they give them a wiggly treat. Harriet and Georgina meet the rarest of British wildlife when they help some wolves wolf down a feast. And Dick gets a bit spiky in the hedgehog hospital.
Dominic and Simran put an otter in a bath and Winney the weasel prepares for a return to the wild. Daniel and Aaron gather goats, spy spiders and ogle owls at a seriously busy sanctuary, and Dom becomes a warm-up act to a comedy donkey.