Madeleine, three-years-old at the time, disappeared nearly 12 years ago during a family holiday in Praia da Luz, Portugal. As Variety reveals, the series "promises new interviews with people connected to the case, with input from more than 40 contributors in all", but not the McCann family.
It also features interviews with Goncalo Amaral, the retired Portuguese police chief who is certain that Gerry and Kate killed their daughter then staged a kidnapping to cover it up.
The documentary comes out on Friday 15 March, so for all those true-crime fans, it will definitely be one to mark in your diaries. However, parents of Madeleine, Kate or Gerry McCann, are not involved. 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.
Maddie was abducted in Praia da Luz almost 12 years ago
"Keeping any search for what happened to Madeleine in the consciousness - particularly globally - is something that's so important".
They said in a statement: "The production company told us that they were making the documentary and asked us to participate".
The disappearance of Madeleine McCann from a resort in the Algarve region of Portugal has always remained shrouded in mystery to the world. "Consequently, our views and preferences are not reflected in the program". "We will not be making any further statements or giving interviews regarding this programme".
To date, Madeleine has been missing for nearly 12 years.
"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.