Here is an interview with Tom Davis regarding Jett Travolta's death and Scientology beliefs regarding the spirit and what happens to it.
It's not a bad interview. The simple concept of what happens to the spirit is a little confused by the interviewer who says something about "he will live again in someone else's body." I guess in such a short time the interviewee has to stick to only a few points so Tom didn't have a chance to clear that one up.
If you want to get a clearer concept of what the Scientology belief is regarding that then check out this video: The Parts of Man