Leah Remini: Scientology and the Aftermath is an American documentary series that investigates the Church of Scientology through the experiences of American actress Leah Remini and other former members. She was a follower of Scientology between 1979, when she joined at the age of nine alongside her parents, and 2013, when she left under acrimonious circumstances. She subsequently became an outspoken critic of Scientology and published a bestselling memoir, Troublemaker: Surviving Hollywood and Scientology, in 2015.

The show's first season was aired by A&E in seven regular and three special episodes commencing November 29, 2016. It received positive reviews from critics, recorded A&E's best premiere ratings since 2014 and maintained a consistently high viewership for subsequent episodes. The first season garnered two Emmy nominations, scoring one win. The series was renewed for a second season of ten regular and four special episodes commencing August 15, 2017. The Church of Scientology was extremely critical of Remini and the show and established several websites attacking the show, its presenters and many of the interviewees. On August 26, 2019, the series ended with a two-hour special.