Here Comes The Flood — [s5e3]

: During surgery, the ceiling collapses onto Alex Karev's patient. Ironically, while clearing debris from the open wound, Alex discovers a stage 1 malignant tumor on the man's pancreas—a diagnosis that likely saved his life because it was caught so early.

: Now living together, Derek pushes for Meredith's roommates, Izzie and Alex, to move out. Meredith initially resists, feeling that they are her family. [S5E3] Here Comes The Flood

: Meredith attempts to quit therapy with Dr. Wyatt , claiming she is finally "happy" now that Derek has moved in. Wyatt remains skeptical, insisting Meredith has only scratched the surface of her issues. : During surgery, the ceiling collapses onto Alex