Curing the Common Cult

S4, E16: After a week away at tennis camp, Jamie appears to have gone through a complete personality change. The family is amazed at her unusual display of affection. The Powells discover that Jamie and her friend Kimberly have fallen under the spell of Abba-Khan (guest star Charles Nelson Reilly), a guru they met at camp. Buddy, who is familiar with the guru's practices, informs Charles that Abba-Khan is a fraud who attracts young people with his teachings about love so they can give him all their money.