Grey's Anatomy Season 10 premieres tonight, Thursday September 26, but waiting until this evening for a new dose of Grey's drama is almost unbearable. Sure, it's only a few more hours — but those hours feel like days. At least we have a few sneak peeks of the episode to help ease the pain of the weight. And what sneak peeks they are! We can actually learn quite a bit from the snippets of the episode we've been given. Let's break down all of the clues here.