 Bowles and Jackson left the show after the sixth season, due to discontent about the production; their departure was explained by the announcement in Season 7 that Cory and Trevor had been committed to a mental institution and were advised to never return to Sunnyvale.Cory returns alone in the eighth season, after Trevor went missing while they were in New York City.He resumes his role as a lackey to Ricky and Julian, with Jacob.