The long-awaited Shonda Rhimes crossover event is now underway as Grey's Anatomy and its spinoff Private Practice teamed up last night for two great hours of TV.

While Derek worked wonders to save Addison's brother Archer from a brain parasite, Sam and Naomi reflected on how their tight-knit group became so dysfunctional.

Elsewhere, Alex started to worry that something's seriously wrong with Izzie, and Violet's concerns over a new mother's depression spark a host of worries of her own.

We've consolidated the episodes into one recap for your convenience, and because it's all Shondaland anyway. Follow the link for a full recap of "Before and After" ...

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