In the final episodes of the ID series, Natalia's continued communication with her prior adoptive family wreaks havoc on the DePaul household as they try to help her understand how she's been exploited.

Anna Newlin, who once lived with the Mans family, defends the Mans family on camera, but then suggests to producers of the show that Natalia was struck with a belt and kicked down a flight of stairs by the Manses. "There's some things that can land [Cynthia] and Antwon in jail for a long time," she says in a voiceover.

The second installment of The Curious Case of Natalia Grace was originally set to be the final chapter of this captivating story. But the conclusion of Part 2 ended on a cliffhanger, with Natalia’s new adoptive family telling production that “something ain’t right with Natalia” and that they’re “done” with her.

The third season of the ID channel docuseries brings to light allegations of financial and physical abuse against Natalia's new adoptive parents, Antwon and Cynthia Mans; THR reached out to the Indiana Police Department about the allegations.

The Final Chapter takes viewers behind the scenes of Natalia Grace’s rocky relationship with her adoptive parents and her dramatic attempt to escape from the Mans family.

“ The Curious Case of Natalia Grace: The Final Chapter ” premieres Monday, Jan. 6, at 9 p.m. ET on Investigation Discovery. Watch the new season for free with a trial from Philo.

The Final Chapter" is premiering in January. When is Season 3 on? What is the schedule? What channel? Find out here.

The series follows the Barnett family, who initially adopted what they assumed to be a 6-year-old Ukrainian orphan with spondyloepiphyseal dysplasia, a rare bone growth disorder.