Grey's Anatomy Premiere: The First Five Minutes

Thursday night is shaping up to be quite the TV night.

This isn't a new concept, but with two of the hottest new shows on this evening in addition to the return of a perennial Top 10 drama, it's more true than ever.

At 8 p.m., the CW airs Vampire Diaries, while FlashForward premieres on ABC (and from the looks of the FlashFoward spoilers we've seen so far, it looks great).

Then at 9 p.m., Grey's Anatomy returns for its sixth season. One that its producers and cast say will be unlike any other we've experienced in its long history.

As a teaser for the premiere, the network has leaked the first five minutes of this two-hour Grey's event. Needless to say, we're in for a gripping evening.

Check out the clip below, in which Alex ponders how to tell Izzie about George, Mark and Lexie hear the news, and she makes a surprising declaration ...