The story of Madeleine McCann's disappearance has gripped the world since 2007 when the three-year-old went missing while on holiday with her family in Portugal.
The new trailer features clips from many interviews that have been held to create this Netflix production.
The dramatic trailer sees one man telling the camera: "This could be the break through, here it is - it all fits!"
Watch The Disappearance of Madeleine McCannon Netflix from Friday 15 March.
The eight-part documentary is produced by London studio Pulse Films and has been criticised by Madeleine McCann's parents, Kate and Gerry McCann. Filmmakers drew on new interviews with more than 40 contributors, 120 hours of interviews, archival news footage, and reenactments to put together the series. Among the theories about what happened to Madeleine are that she was abducted during a burglary gone wrong, taken by child sex traffickers, or wandered off on her own and was killed. Their spokesperson told The Guardian: "Kate and Gerry didn't ask for it and don't see how it will help the search for Maddie on a practical level, so they chose not to engage".
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He said: "We are indebted to those soldiers who served with courage and distinction to bring peace to Northern Ireland". We have cried out for them for many years, and now we have succeeded for them.
In the doc, which was directed by Chris Smith (who was also at the helm for Fyre: The Greatest Party that Never Happened and Jim & Andy), Gamble says: "I absolutely believe that in my lifetime we will find out what has happened to Madeleine McCann". They also confirmed, "Our views and preferences are not reflected in the programme". "We will not be making any further statements or giving interviews regarding this programme".
Netflix has been pumping out some pretty good true crime documentaries about real-life abduction and murder cases that still remain a mystery. Many "armchair detectives" who followed the investigation insist that her parents were behind their child's disappearance.
Around £11.75 million has been spent on the near-12 year investigation.
"Madeleine's Fund", which Kate and Gerry set up to raise money for the investigation, has been supported by a number of celebrities including Philip Green, Simon Cowell, Coleen Rooney, J.K. Rowling, and Richard Branson.
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