Addison isn't just back on Grey's Anatomy. She's married to Derek... at least in this unusual dream world/scenario.
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Grey's Anatomy viewers also have reason to smile on the episode "If/Then." Addison makes an appearance on the installment!
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Look who is returning on the Grey's Anatomy episode "If/Then." We get to see Addison back in Seattle Grace.
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Awww, remember when these two were good pals? We'll see them interact again on the Grey's Anatomy episode "If/Then."
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It's a team effort and a family affair on the Grey's Anatomy-Private Practice crossover event January 14, 2010. Can Sloane be helped when Mark and Addison join forces?
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Kate Walsh (Addison) is back on Grey's Anatomy, but still on Private Practice, of course. She stars on one Shonda Rhimes series after getting her start on the other.
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Mark and Addison in a photo from "Blink." A crossover event is totally in effect as Grey's Anatomy finally returns from its hiatus on January 14, 2010.
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Sometimes, the Grey's Anatomy cast is not enough. Someone from Private Practice needs to be brought in for expertise.
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Derek, Addison and Callie in "Blink." Grey's Anatomy finally returns from its hiatus on January 14, 2010.
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Mark, Addison and Arizona tend to Sloane. Hopefully his daughter makes it.
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Not a real romantic reunion, of course (and thankfully) - but Addison and Derek are back together on Grey's Anatomy at least for one week, sparring over surgery.
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Mark and Addison used to have a thing. Now the only thing they are worried about is saving her brother's life.
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Grey's Anatomy Quotes

MEREDITH: "You don't get to call me a whore. When I met you, I thought I had found the person that I was going to spend the rest of my life with. I was done! All the boys and all the bars and all the obvious daddy issues, who cares? I was done. You left me. You chose Addison. I'm all glued back together now. I make no apologies for how I chose to repair what you broke. You don't get to call me a whore."
DEREK: "This thing with us is finished. It's over."
MEREDITH: "Finally."
DEREK: "Yeah, it's done."
MEREDITH: "It is done."

There's a reason I said I'd be happy alone. It wasn't 'cause I thought I'd be happy alone. It was because I thought if I loved someone and then it fell apart, I might not make it. It's easier to be alone, because what if you learn that you need love and you don't have it? What if you like it and lean on it? What if you shape your life around it and then it falls apart? Can you even survive that kind of pain? Losing love is like organ damage. It's like dying. The only difference is death ends. This? It could go on forever.

Meredith