Addicted to prime-time TV shows that are 1% medicine and 99% drama? Here's a little comedy to add to your diet. The Mad TV gang scrubbed up to show you what would happen if the cast of "Grey's Anatomy" were to meet that obnoxious know-it-all doc from "House." Diagnosis: Funny. I mean, who knew you could deliver a baby with a catcher's mitt, or that there's not only a McSteamy and a McDreamy--but also a McSupremey?