If you can't wait until tonight to get a glimpse at the trauma to come, we've rounded up all of the sneak peeks for the episode right here.
Spoiler-phobes, this one's for you: We won't mention anything not shown in the official promo material.
We know everyone is desperate for more info about what happened to Arizona (Jessica Capshaw). This sneak peek shows her tearfully begging Callie (Sara Ramirez) to make sure no one cuts off her leg. Callie promises she will — a promise we already know she breaks. Cue tears.
Speaking of people we know come to a tragic end, here we see Mark (Eric Dane) alive and well enough to sit up and talk. In fact, despite being a little worse for the wear, he seems like his old, charming self. That makes his eventual, inevitable downward spiral even sadder.
In slightly less depressing news, here Callie (Sara Ramirez) proposes a risky surgery for Derek's (Patrick Dempsey) hand that could potentially restore full movement. He suggests she operate on him. She says no, but we have a feeling he'll change her mind.
Want more? You can see what happens to Cristina (Sandra Oh) after the crash here, and get more hints at what's to come with the previewfor the episode.
Catch the next new episode of Grey’s Anatomy on Thursday, October 4 at 10 p.m. ET/PT onABC.
Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter@BeccaMartin47.