Surgical fatalities occur in threes and sevens, at least that's the rumor on the surgical floor. With four fatalities in the morning alone, superstition rules the roost at Seattle Grace, so Addison jujus Meredith for good luck. Burke has George retrieve a scrub cap Cristina is holding hostage, Meredith and Bailey try to convince a friendly stalker to operate and Cristina is annoyed endlessly by her OCD patient while Richard's past arrives in Seattle Grace.