Katie and Katherine get to work at the largest nesting swan colony in the UK. Chloe and Kieran care for Mona, the dog with no owner, at a dogs' home in Glasgow. Also, Dick and Dom beaver away with giant rodents that were nearly hunted to extinction over four hundred years ago.

Claire and Matthew become vet assistants for the day in Dunfermline, as a horse needs help, and Holly the dog has surgery. Ewan and Ethan eye up an owl with a sore head in Norfolk. And Dom is in at the deep end when he's asked to clean a giant shark tank.

William and Josh take on charging bison and fallow deer, and help exercise owls in Kent. Aina and Alisa muck in and lead Blue the shetland pony to pastures new in Norfolk. And Dick and Dom deal with Diesel, the dog with the mucky mouth.