Return of the documentary following the work of detectives from City of London Police. The first of three programmes reveals how criminals make millions conning victims into buying worthless land they claim is ripe for property development. Footage seized from mobile phones shows how one gang ruthlessly targeted victims and squandered profits on lavish holidays and luxury homes. Incredibly, as the ringleaders faced court, with their passports confiscated and bank accounts frozen, they set up another multimillion-pound fraud. Narrated by Richard Armitage