Matt attends the scene of an RTA involving an HGV and discovers fridge/freezers with holes in bottom. Tony and Dave come across a group of men wandering away from the crash, however only one is arrested. Upon his arrival to custody, he asks to speak to Derek, revealing he is an immigration officer from France and he was on board the crashed truck with a group of immigrants. Debbie links the case to the body of an unidentified man pulled from the river. Dave makes up with Tony after revealing his divorce from Jenny has been finalised, and after deciding against a relationship with Liz Terry, gets a chance to change his life in a better way when he is offered a major undercover operation; with Dave asked to pose as a hotel owner with Debbie, he asks for Polly, but when she turns the offer down, can Dave talk her round? Tony is also asked to go undercover as an HGV driver in the same operation.