11 p.m. Aug. 9, Adult Swim "The greatest hospital drama in the history of recorded media," er, Rob Corddry's always edgy and mostly inappropriate spoof of medical dramas returns for a fourth season of fun.The origins of Chief's (Megan Mullally) handicaps will be revealed this season, and a character will die a couple of times. Also, Jon Hamm returns as a guest star, and Corddry promises an all-British episode guest starring Dominic Monaghan and Frances Fisher. In the season premiere, titled "The Boy with the Pancakes Tattoo," an airborne virus threatens to destroy the hospital and all humanity. Just tune in for the 15-minutes episodes; you won't be disappointed. Pictured: Blake Downs (Rob Corddry), Cat Black (Lake Bell) and Lola Spratt (Erinn Hayes) watch as Owen Maestro (Rob Huebel) gets handcuffed.