Heathrow A routine passport control check with Immigration Officer Steve Hassler turns into a marathon investigation. The “student” from Pakistan makes a mess of his answers and Hassler smells a rat. Spanning 2 days, 2 Chief Immigration Officers and a second Immigration Officer, the man, they discover is a taxi driver with a wife and 2 children, living in Luton. He is refused entry to Britain. But on appeal he is allowed to stay while his case is investigated. London Enforcement - Cleaners The Enforcement team at Beckett House, London, raid a cleaning company and arrest 2 suspected illegal immigrants. All they have to do now is prove where they’re from and find their passports. Easier said than done. What follows is an emotional and frustrating day in the life of an immigration team.