7/8. Thailand. More than 3,000 people are still missing in Thailand following the Asian tsunami. But while desperate efforts have been made to locate loved ones, there are some who prefer not to be found. Tanya Datta travels to Thailand to track down the tsunami's invisible victims - Burmese migrant workers. She talks to those who once worked in the coastal areas but are now in hiding, and discovers how the devastating impact of the tidal wave on them has been twofold. Repeated from Thursday