The stunning end of last night's episode of Grey's Anatomy and the promo for next Thursday's season finale certainly made clear what the dark, complex thing Shonda Rhimes teased consists of.

In the aftermath of the crash, the doctors must battle to stay alive while trying to save the lives of their peers, as the shocking turn of events last night could mean devastating consequences.

Take a look at ABC's first promo for "Flight" and get scared now:

Also in the eighth season finale, Bailey and Ben make a decision regarding their relationship's future, Teddy is presented with a tempting offer, and Richard plans a special dinner for the residents.

As always, the Grey's Anatomy season-ender is not to be missed. Even with the original cast now under contract for next season, there's no telling which characters might pay the ultimate price.

For an in-depth discussion of this week's penultimate Season 8 episode, read our review of "Migration" from earlier. We've updated our Grey's Anatomy music section with last night's tracks, as well.

Then, as we gear up for the main event, tell us:

Will Mark and Lexie get back together? Are any or all of the doctors really leaving Seattle? Are Cristina and Hunt done? Will everyone survive the plane crash? Sound off in the comments below!

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