Mr. Moseby gives Zack and Cody tickets to a baseball game while the health inspector arrives at the Tipton. Unfortunately, the boys arrive before the inspector does and due to Zack's rat (and Cody's, which he stole as part of their science project), it causes chaos in the hotel, getting Mr. Moseby fired in the process. Together, they must devise a way to get Mr. Moseby back.

Guest Stars: Caroline Rhea as Ilsa, Adrian R'Mante as Esteban