Addison isn't just back on Grey's Anatomy. She's married to Derek... at least in this unusual dream world/scenario.
Added:
Grey's Anatomy viewers also have reason to smile on the episode "If/Then." Addison makes an appearance on the installment!
Added:
Look who is returning on the Grey's Anatomy episode "If/Then." We get to see Addison back in Seattle Grace.
Added:
Awww, remember when these two were good pals? We'll see them interact again on the Grey's Anatomy episode "If/Then."
Added:
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?
Added:
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.
Added:
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.
Added:
Sometimes, the Grey's Anatomy cast is not enough. Someone from Private Practice needs to be brought in for expertise.
Added:
Derek, Addison and Callie in "Blink." Grey's Anatomy finally returns from its hiatus on January 14, 2010.
Added:
Mark, Addison and Arizona tend to Sloane. Hopefully his daughter makes it.
Added:
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.
Added:
Mark and Addison used to have a thing. Now the only thing they are worried about is saving her brother's life.
Added:

Grey's Anatomy Quotes

Meredith: You're me.
Amelia: What?
Meredith: You're me before Derek. I can be here for you. I can do this. I get you. I can be a twisted sister for you. Just tell me how do you want to play this?

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)