Alex and Cristina converse in this picture from "Here Comes the Flood," from the fifth season of Grey's Anatomy. Looks like a great one!

Steven Culp guest stars on Grey's Anatomy Season 9. Here he is with Sandra Oh (Cristina).

Cristina and Shane in a photo from the November 29, 2012 episode of Grey's Anatomy.

It's Cristina's turn to walk down the aisle at April's wedding on Grey's Anatomy. "Get Up, Stand Up" is the 12th episode of the show's tenth season.

Yang yips

Dr. Yang reacts

Steven Culp is ready to slice and dice his way around Grey's Anatomy Season 9. He's coming on board in Episode 3.

Sorry, Jason Mesnick. This proposal to DeAnna Pappas didn't go over so well.

Drs. Alex Karev (Justin Chambers) and Cristina Yang (Sandra Oh) do their thing - and surely exchange barbs - in a photo from "Rise Up," from the fifth season of Grey's Anatomy (Fall 2008).

Burke is back on Grey's Anatomy. Much to the shock of Cristina, of course.

Do you think this means good things for Henry? We're just speculating, but we can't imagine it's a good sign.

What does the future hold for Cristina? That is the question on the minds of all Grey's Anatomy fans.