Leah Remini: 'Being Critical of Tom Cruise Is Being Critical of Scientology Itself'0:31

Actress and reality TV star Leah Remini will spill the beans on the Church of Scientology, where she was formerly a member, and on the most famous Scientologist, Tom Cruise, in an interview that will air on "20/20" on Oct. 30 (video below). "The decision to leave is your giving up everything you have worked for your whole life," Remini says in a preview clip released by ABC News. "I feel that people need to understand, this has been my whole life and I want them to understand how it happens." "And so as time goes on, you start to lose touch with the real world," Remini adds. "The mindset becomes 'us against them.'" “Being critical of Tom Cruise is being critical of Scientology itself, you are evil,” Remini states. More