Credit: Randy Holmes/ABC Television Group © 2011 Disney Photo: Grey's Anatomy Season 8, Episode 8: Derek and Lexie Talk

We've been looking forward to Grey's Anatomy Season 8, Episode 8, "Heart-Shaped Box" ever since we learned that George O'Malley's mom was returning for the week. We're sure that Ms. O'Malley undergoing surgery will shake the Seattle Grace-Mercy West docs to the core, and there's nothing we love more than watching our fave super surgeons freak out.

Plus, it looks like the Jackson (Jesse Williams)/Lexie (Chyler Leigh)/Mark (Eric Dane) love triangle finally reaches a breaking point. We knew Lexie nailing Mark's new girlfriend in the boob would have long reaching consequences.

Credit: YouTube Photo: Grey's Anatomy Season 8, Episode 8 Preview (VIDEO)

Catch the episode on Thursday, November 3 at 9 pm ET/PT on ABC.

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