 As Hubbard 's followers progress in their Scientology teachings , they learn of the story of evil alien prince Xenu . Celebrity actor characters describe their relationships with Scientology : John Travolta explains how Scientology " fueled his cool " ; Kirstie Alley says that it helped her conquer drug addiction " enabling me to star in the fine television series Fat Actress and to promote the quality products of weight loss expert Jenny Craig " ; and Tom Cruise interacts with sock @-@ puppet incarnations of his new wife and daughter . The Internal Revenue Service brings a case against Hubbard , but he is able to defeat the tax charges by brainwashing his accuser . Celebrities Cruise , Alley and Travolta testify on Hubbard 's behalf during the trial . Skeptics question Hubbard about the Church of Scientology 's finances and methods of recruiting and retaining members . One young boy , left alone on the stage , sings about profound alienation . The entire company finally comes together to sing the " chilling finale " , which includes the refrain : " Just don 't ask questions / And everything is clear . " 
