While the family prepares Thanksgiving dinner for Cate to give her some much needed time off, she's left with nothing to do until she brings home an unexpected guest while on an errand -- Principal Ed Gibb (Adam Arkin, "Chicago Hope"). Meanwhile, while C.J. deep-fries the turkey, Bridget and Kerry spar over pie recipes; Jim disassembles the TV in a shocking attempt to repair it; and Cate finds herself with an insurance adjuster the day after the holiday to find out who was responsible for burning down the garage.