Slaving away: The dirty secrets behind Australia's fresh food. It's in your fridge and on your table: the fresh food that we take for granted. But there's a dirty secret behind it. Much of it is picked and packed by a hidden army of migrant workers who are ruthlessly exploited. A Four Corners investigation has uncovered gangs of black market workers run by unscrupulous labour hire contractors operating on farms and in factories around the country. The produce they supply ends up in our major supermarkets and fast food chains. These labour hire contractors prey upon highly vulnerable young foreigners, many with very limited English, who have come to Australia with dreams of working in a fair country. They're subjected to brutal working hours, degrading living conditions and the massive underpayment of wages. Reporter Caro Meldrum-Hanna has obtained undercover footage and on-camera accounts of this dark world.

Four Corners is Australia's premier television current affairs program. It has been part of the Australian story since August 1961, exposing scandals, triggering inquiries, firing debate, confronting taboos and interpreting fads, trends and sub-cultures. Its consistently high standards of journalism and film-making have earned international recognition and an array of Walkleys, Logies and other national awards.