In the clip above, Katherine talks about knowing she'd return to the show last year and her surprise that the show runners let that slip so soon. Also, she tells us what will be hard about the next season of Grey's now that a certain someone is missing from the opening credits. Not that they have them anymore, but still.
Are you happy that Heigl is staying on and Knight is saying farewell? Or would a switcheroo be fine by you? Discuss in the comments.
Get the lowdown on who else is returning to Grey's Anatomy here.