The title of Thursday's all-new episode of Grey's Anatomy, "Here Comes the Flood," is to be taken literally. A plumbing leak causes a flood at Seattle Grace, and the Chief tries to maintain order through the chaos while at the same time implementing new teaching policies.

Meanwhile, George retakes his residency exam, and Derek tries to get Izzie and Alex to move out of Meredith's house so they can start "their life" together ... with interesting results. Click to enlarge these photos from the episode - and follow the jump for many more!

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