Another exciting Grey's Anatomy episode on tap tonight. Addison is back and Derek is feeling the awkwardness - not only from his ex-wife, but from his ex-girlfriend and current girlfriend (the infamous, universally despised nurse Rose).

How will this and other story lines play out? What are you hoping happens tonight? Discuss "Piece of My Heart" with your fellow Grey's Anatomy fans before, during and after the show in Grey's Anatomy Insider's exclusive forum!

We will have our thorough episode recap, along with our photo gallery, music guide and list of Grey's Anatomy quotes, up for you as soon as we can! Enjoy!

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