More Grey's Anatomy Previews: "Good Mourning/Goodbye"

Four new sneak preview clips of this week's premiere of Grey's Anatomy have been released online. In the first excerpt, Callie convinces Alex to tell Izzie about George ...

Follow the jump for three more clips from "Good Mourning" and "Goodbye" in which:

• Alex breaks the news about George to a stunned Izzie
• Callie receives some bad news regarding a promotion
• Arizona tries to help Bailey cope with George's state

Check out some of the drama coming our way Thursday night...