Luke, who grew up on a council estate, is with investigators as they catch a tenancy cheat red-handed. He's also on hand as a social housing flat is repossessed after investigators discovered it was being unlawfully sublet, making the tenant thousands of pounds of profit. And Luke meets a family of four who have finally got the home they were in desperate need of - after almost two decades on the waiting list.

In this episode, it's third time lucky for housing officers as they show just how determined they are to track down a tenant they suspect no longer needs, or uses, his social housing property... because he has bought a place of his own. And Luke hears how an anonymous tip-off helped to unravel a tenancy scam that involved one family and two properties and spanned more than twenty years.