The SVOD is to launch the multi-part series on 15 March.
Directed by Fyre: The Greatest Party that Never Happened and Jim & Andy director Chris Smith, the series is produced by Pulse Films and Paramount Television and exec produced by Emma Cooper and Thomas Benski.
Madeleine McCann went missing in 2007 from her family's apartment in Portugal. The public became - and to a large degree, still is - obsessed with finding out what happened to the little girl.
Police looked at several different suspects - including the girl's parents.
She had been left with her younger siblings while her parents, Kate and Gerry McCann, were out for dinner in a tapas restaurant. They include Anthony Summers and Robbyn Swan, the investigative journalists who co-wrote 2015's "Looking for Madeleine"; Gonçalo Amaral, the investigating coordinator with the Policia Judiciaria in Portugal; Robert Murat, who was once considered a suspect in the case; Jim Gamble, former head of the Child Exploitation and Online Protection Centre in the United Kingdom; and Phil Hall, the McCanns' former PR rep, Phil Hall.
The documentary also hears from private investigator Julian Peribanez, who was hired by the McCann family, and former Portuguese police chief Goncalo Amaral.
According to The Sun, the documentary will focus on the human trafficking explanation, claiming Madeleine was taken to be sold.
Kate and Gerry McCann. Credit PA
"It goes beyond the headlines and takes a unique look at the facts of the case as well as its impact on media standards around the world". Their lawyer, Rogério Alves, was interviewed for the series.
Experts on the show also make some shocking claims, with some saying that Madeleine is still alive.
A new Netflix true-crime documentary is on the way, focused on one of the most famous missing-person cases in recent history: Madeleine McCann.
In a statement about the docu-series, the McCanns said: "We are aware that Netflix are planning to screen a documentary in March 2019 about Madeleine's disappearance".
"The production company told us that they were making the documentary and asked us to participate".
"We did not see - and still do not see - how this programme will help the search for Madeleine", the McCanns wrote in a statement published by the BBC.