Stuart works fast to find the children of separated parents when CCTV footage shows the brother and sister talking to a known paedophile. However, his involvement in their disappearance soon proves to be more than meets the eye. New recruit PC Benjamin Gayle is teamed with Will to investigate an assault on a Polish building worker, and finds himself in a tight spot when the victim's colleagues cut up rough about his fish-poaching activities on the common. (thetvdb.com)