A new cardio surgeon for seattle grace? Must say I was wondering when that was going to happen and it happens to be the blonde chick off the low rating show Lipstick Jungle! I don't think that Lipstick Jungle is even on anymore, might have had the plug pulled. However I did find her to be the biggest asset to that show and its great to see her on Grey's. And on top of it you can see that her and Owen (war buddies) have some sort of history between them.
As many of the viewers of the show can agree, Christina is very picky about her Cardio Surgeon" Goddess", and just how much she can learn from them. So it will be interesting to see what will happen in the upcoming episodes.
I think it is time for Richard to step off Grey's Anatomy. His character has never really brought any great drama to the show besides that tad bit of history with Merideth's mom. But that is already exhausted. Nothing against his acting ability, he is a great actor, just time to get someone new as chief. And I think it would be best if Derek wasn't it. Too predictable.