The Grey's Anatomy Season Six cast is slowly but surely shaping up.

Jessica Capshaw (Arizona) has been promoted to series regular.

T.R. Knight (George) is a goner, ending months of speculation.

Now Katherine Heigl (Izzie) is said to be coming back.

That is probably the most surprising development of all, as Heigl has been rumored to want off the show for almost a year now. Could it be that she used the threat of leaving to secure more air time and had no intention of actually bolting the ABC medical drama?

Or, could she have had a change of heart about leaving a $2 million-a-year gig in an economy less lucrative to even A-list stars than it was a year ago?

Continue reading about Heigl's return to Grey's Anatomy ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.