Four new sneak previews of this Thursday's Season Six premiere of Grey's Anatomy have been released. In the first, we see Callie convince Alex that he has to tell Izzie what happened to George, despite how negatively the ailing Dr. Stevens is likely to react ...

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Follow the jump for three more clips from "Good Mourning" and "Goodbye," in which Alex breaks the aforementioned news, Callie receives some bad news of her own (regarding a promotion to attending) and Arizona tries to help Bailey cope with George's accident ...

[video url="http://www.tvfanatic.com/videos/greys-anatomy-season-6-premiere-sneak-preview-4/" title="Grey's Anatomy Season 6 Premiere Sneak Preview #4"] [/video]

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