Madeleine McCann was just three years old when she disappeared in 2007.
The toddler was holidaying with her family in Portugal when she went missing, while her parents were dining at a nearby restaurant.
There has never been a credible sighting of her since.
At around 10.00pm on May 3, 2007, British doctor and mum-of-three Kate McCann left a local tapas bar and walked the 83 metres back to her holiday apartment to check on her sleeping children.
The Disappearance of Madeleine McCann trailer. Post continues after video.
Kate, her husband Gerry, their three-year-old daughter Madeleine, and their two-year-old twins Sean and Amelia, had travelled to the area from Leicester, England, for a family holiday.
When Kate arrived at apartment 5A she immediately felt that something wasn’t right.
The door to the children’s room was further open than she had left it. When she looked in the room she saw Madeleine’s bed was empty. A gust of wind then blew into the room, revealing the open window and window shutters on the wall opposite Maddie’s bed.