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?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?