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Reality series. Presenter Michelle Ackerley and property expert Luke Doonan follow investigators as they crack down on rogue social housing tenants, seize their homes and give them to families in genuine need. In episode four, investigators are joined by the police as they reclaim a flat which they suspect is no longer occupied by the official tenant. They find that the tenant is nowhere to be found and the flat is occupied by a pop singer who hit the charts back in the 1970s. Michelle also reveals how one social housing tenant moved to Greece but, instead of giving the keys back, he passed the property onto his daughter. Meanwhile, investigators in Lambeth, south London, pay a surprise visit to one of their council flats - only to discover that the tenants who are supposed to be living there moved to Portugal nine years ago.