A couple head to a dog first aid training course, in order to protect their cross-yorkie. Kate rescues a staffie from a house littered with drug paraphernalia. Sue notices a staffie in her care, is brilliant at fetching items and wonders if he has a future as a police dog. Emma and the police work together to raid an illegal puppy farm. Plus a catch-up with Elsie the dalmatian featured in the last series.