'Grey's Anatomy' recap: The Painful Truth
The residents are all panicking about the Boards and decide they need to study some real cases and not just hypotheticals off of flash cards. Alex tries to sneak a bunch of charts from the library but he's caught, and told that the files don't leave the room. He gets the brilliant idea to have the Lexipedia read everything and then quiz him and when the others catch wind of this, they bombard her with files too. Everyone, that is, except for Mere who is totally and awesomely prepared because Callie's method really is that good. Lexie basically turns into a pile of mush from info overload so Mere forces everyone to leave her alone, but then calls all of them over to her house to start her own tutoring method; they will all sleep and eat and spend every moment they aren't at the hospital at Mere's house studying as a group.
Cristina and Owen are both out with the "flu" (more on that later) and so Mark is Chief for the day, since Owen asked for him by name to fill in. He takes it crazy seriously and gets very annoying, very fast. Derek and Ben have a very complicated surgery to do that they both think is too dangerous, but Mark just orders Derek to come up with a solution. Derek manages at the last minute to have a genius idea involving the use of a bean bag chair, Mark beams at how he brought out the best in his friend, and the surgery is successful.