'Grey's Anatomy': Heart Murmurs

So happy that the heart baby made it, too; I was skeptical about that one. ''And God admired his amazing skin flap,'' Sloan intoned. ''And he saw that it was good.'' Seriously. Story line. Now. The successful surgery even begat a perfectly placed Bailey monologue moment, when she told Addison that her heart ''hurt so much I want to rip it from my chest sometimes.'' Of course, because the baby lived, the tumor guy had to die; it's the conservative property of Seattle Grace. But Meredith and Derek had a nice postsurgery moment, and we all know what that means.

That also meant Addison's work was done here. (And she, sadly, confirmed it by telling the Chief, ''I needed to come back here to see that it was right to leave.'' No! Addy! For your sake and theirs, don't!) There were some other nice moments to go around: George and Izzie, who I'd love to see become friends again, and Rose-Addison-Derek-Meredith-Sloan in the elevator, which was just funny.

And in the end, Callie showed up at the postwork bar gathering just in time to give poor Sloan like half a story line, using him to prove her straightness, leaving with him instead of Hahn. Izzie got the lab results on Ava/what's-her-name, which showed that she — gasp — wasn't anything near pregnant. And Addison laid down the law one last time with Meredith, saying, ''Are you letting him get away? Because I swear to God, Meredith, if you let him ride off into the sunset with that doe-eyed little thing...'' Yes, I must admit it's true: Addison even got me excited about the idea of Mer-Der again, which I had been pretty burned out on. I wish Grey's wouldn't let Kate Walsh ride off into the sunset. But the TV biz is much harsher than Seattle Grace.

What do you think? Are Mer and Der back? Are Callie and Hahn going to become an item? And what is Alex going to do when he learns the truth?

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