The Exor-Sis - S1.E20

Merton was going to throw a party but no one would receive his invitations, plus Tommy and his buddies make fun of Merton, hurting his feelings. When Merton confronts him about it Tommy starts to 'wolf out' but Merton won't help. But accepts Tommy's help after a big announcement Tommy makes in the cafeteria. So Tommy helps him out on the appearance of theparty. Meanwhile, Merton's sister is possessed by a demon from a locker under the school. Merton gets caught but doesn't get in trouble because of 2 things. They were happy he was trying to fit in, and they get a hot tub.