Silly interns, appendectomies are for real doctors! Press play above to get an early look at this week's Grey's Anatomy. It seems that Lexie and the rest of her gang of medical wannabes have really done it this time. Can Mer and Cristina save the day and the dude on the table? Post your verdict in the comments, and check out the other three clips below to see what else happens tomorrow night, including sex sounds from Izzie's room and more Sadie mischief. (That minx!)