The following plot was taken from Feel free to expand it!

Jamie comes home from tennis camp with a completely new attitude which confuses Sarah and Adam even Walter, when Charles and Buddy discover that Jamie has been recruited by a cult leader named Abba-Khan. Charles has a really difficult time believing it, he sets out to prove that Abba-Khan is a fraud who is only in it for the money, but Jamie refuses to listen to him, so Charles sets up a seance for the cult members, Buddy then transforms into "Crouton", they believe him, they then follow him around everywhere to get answers from "Crouton". When Abba reveals his true colors by admitting that it is a fraud and offers Charles and Buddy 20% of the take, he then leaves and Jamie overheard everything, the family is just thrilled to have the old Jamie back.