At a time when immigration to the UK is at an all-time high and the issue is at the centre of political debate, this episode explores the lives of legal and illegal immigrants living here. It's increasingly falling to the emergency services to bridge cultural divides and keep a lid on bubbling racial tensions that threaten to erupt. In Crewe, PC Greg Greaves finds himself at a heated arrest after reports of shoplifting from a supermarket. He has to call for backup as the two suspects shout claims of abuse and racism at him. In Warrington, paramedic Becki arrives at the home of Marika, a Latvian woman who has been mugged in the street and left with a black eye.