Question: Which film, directed by Roger Christian is based upon the first half of L. Ron Hubbard's 1982 novel of the same name? 
Sentence (from "Revolt in the Stars"): L. Ron Hubbard had already presented this story to his followers, as a true account of events that happened 75 million years ago, in a secret level of Scientology scripture called Operating Thetan, Level III.
Relevant evidence: No