Below is a promo for this Thursday's all-new Grey's Anatomy episode, called "Sympathy For the Parents." Looks like an Alex-centric episode on tap this week at Seattle Grace.

When his younger brother, Aaron, shows up with a hernia, it's up to Alex to get Bailey's approval for pro bono surgery. The reunion is more complicated than that, of course.

Aaron discloses that his family has not heard from Alex since he arrived in Seattle, and parts of Alex's past, long kept secret, are revealed to his friends and fellow doctors.

Our guess is that there will be physical and emotional blows flying left and right. There's plenty of other non-Karev drama taking place this week too, as you can see below ...

We'll have photos and sneak peeks up soon, but for now, here's the first promo:

[video url="http://www.tvfanatic.com/videos/sympathy-for-the-parents-promo/" title="Sympathy For the Parents Promo"] [/video]

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