With a ewe and her unborn babies in danger, Peter Wright heads to one of his most unusual lambing locations. The flock are under a railway bridge but, thanks to some rogue sheep in the road, Peter's arrival is delayed. Julian Norton hopes that cutting-edge technology can end a rough collie's serious leg problems. There's something fishy going on at the Huddersfield hospital, as Matt Smith performs surgery to remove a Koi carp's tumours. Shona Searson visits a pony with mysterious lumps on her skin. And budding young vet Lizzie, who owns Peter's favourite little donkey patient Elvis, gets her first taste of work experience on the road.