Grey's Anatomy is all-new tomorrow with "Superfreak," an episode built around the arrival of Amelia Shepherd. The following week, "Can't Fight Biology" should be just as intense.

Lexie loses it when Meredith and April grow closer, a car accident brings in multiple traumas, Jackson tries using his looks to get ahead, and Cristina's self-doubt causes new issues.

Things become hostile on all fronts when a visit to the obstetrician results in some disturbing news for Meredith and Derek. Fortunately, they don't seem too bothered right here:

Perhaps this is more of the sex-crazed McDreamy we've been promised, but the visit to the OB sounds pretty alarming. Any thoughts on what it could mean for MerDer?

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