In the first episode of a three-part story arc, the staff at Seattle Grace swings into action when disaster strikes on Coleman Dock. A cargo ship has plowed into a ferryboat, killing several people and seriously injuring many more. Some of the survivors are in such bad shape that Dr. Webber (James Pickens Jr.) must literary play God, deciding on the spot who can be saved and who can't. Cristina (Sandra Oh) takes special interest in a grotesquely disfigured and very pregnant "Jane Doe" (Elizabeth Reaser), while Alex (Justin Chambers) must keep his arrogance in check as he deals with the victims' anguished relatives. The situations worsens when, while providing aid and comfort to an eerily calm child victim (Madison Leisle), Meredith (Ellen Pompeo) loses her footing and falls in the water--and she can't swim! ~ Hal Erickson, Rovi