X-Men Evolution Season 3 Episode 33 - Mainstream Episode Title:Mainstream.Episode Description:Despite rescuing Professor X, the bigotry towards mutants still exists as our heroes return to Bayville High, scorned and verbally abused by their human classmates, including their mutant-hating Principal Edward Kelly. Also, the School Board decides whether or not to allow mutants to attend school. However, Kelly enlists Duncan to team up with the Brotherhood (Avalanche, Toad, & Blob) to ensure a permanent mutant ban.