Bart, Lisa and Maggie, the three mumps children, are visited by The Fat in the Hat, but, really he just wants to slaughter everyone. Bart gets beheaded so they sow his head onto Lisa's body with only Lisa in control but Bart finds a way for him to be in control. Mr Burns' owns a freak circus and Strongman (Homer) tries to kill Moe so he can get Marge back and keep her emerald, but, the other freaks plot revenge.
—johnpeake35