The intense new docuseries premieres Tuesday, Nov. 29.
Leah Remini is taking her experience with the Church of Scientology to TV.
The King of Queens star is trying to shed light on the Church in the A&E docuseries, Leah Remini: Scientology and the Aftermath, and the new trailer, premiering exclusively on ET, shows just how intense her convictions are.
RELATED: Leah Remini's New Docuseries Aims to 'Shed Light' on the Church of Scientology
"My whole life I was a very dedicated Scientologist. I didn't want to find out what I'd done was a lie," the 46-year-old actress says in the trailer, which is intercut with former members emotionally recalling their experience with Scientology. "Something inside of me was saying, 'Get them out of this thing.'"
"Fight for your family, fight for your daughters, your sons," she adds. "Wake up."
WATCH: Leah Remini Claims Church of Scientology Wanted to Recruit Jennifer Lopez
Remini, who left Scientology in 2013 after being a member since childhood and has since disavowed the Church, is executive producing the eight-part series.
"This series is about sharing the truth about Scientology," Remini said in a statement about the show. "Truth born out of very personal experiences. Truth that is shocking, things I did not expect to find when I embarked on the journey of making these shows."
WATCH: Leah Remini Spills 8 Shocking Claims About Tom Cruise and Katie Holmes' Wedding
"Even though I had been a member of the Church for a long time, I was stunned by some of the things I learned. There is a lot more to this story than anyone knows," she added. "And this series is breaking ground in bringing that information to light."
ET has reached out to the Church of Scientology.
The Church has previously responded to Remini's past criticisms, including claims made in her book, Troublemaker: Surviving Hollywood and Scientology, saying in a statement to ET, "It comes as no surprise that someone as self-absorbed as Leah Remini with an insatiable craving for attention would exploit her former faith as a publicity stunt by rewriting her history with it, including omitting that she was participating in a program to remain a Scientologist by her own choice, as she was on the verge of being expelled for her ethical lapses."
Watch the video below for more on the show.
Leah Remini: Scientology and the Aftermath premieres on Tuesday, Nov. 29 at 10 p.m. ET/PT on A&E.
