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

Did you say it? 'I love you. I don't ever want to live without you. You changed my life.' Did you say it? Make a plan. Set a goal. Work toward it, but every now and then, look around; Drink it in 'cause this is it. It might all be gone tomorrow."

Meredith (closing voiceover)

Lexie: [narrating] Grief may be a thing we all have in common, but it looks different on everyone.
Mark: It isn't just death we have to grieve. It's life. It's loss. It's change.
Alex: And when we wonder why it has to suck so much sometimes, has to hurt so bad. The thing we gotta try to remember is that it can turn on a dime.
Izzie: That's how you stay alive. When it hurts so much you can't breathe, that's how you survive.
Derek: By remembering that one day, somehow, impossibly, you won't feel this way. It won't hurt this much.
Bailey: Grief comes in its own time for everyone, in its own way.
Owen: So the best we can do, the best anyone can do, is try for honesty.
Meredith: The really crappy thing, the very worst part of grief is that you can't control it.
Arizona: The best we can do is try to let ourselves feel it when it comes.
Callie: And let it go when we can.
Meredith: The very worst part is that the minute you think you're past it, it starts all over again.
Cristina: And always, every time, it takes your breath away.
Meredith: There are five stages of grief. They look different on all of us, but there are always five.
Alex: Denial.
Derek: Anger.
Bailey: Bargaining.
Lexie: Depression.
Richard: Acceptance.