With ER closing its doors forever this season, we're looking forward to our other fave funny hospital show Scrubs returning on a new network in January. The switch from NBC to ABC is also bringing changes to the cast. Courteney Cox Arquette will hit the show as the new chief of medicine! Does seeing Courteney make you miss her other Friends? Then you'll be psyched to see Matthew Perry come in later this season. Paging Dr. J.D.! We'd like to prescribe a dose of Ross, Rachel, and crew, too!