Why is Izzie still seeing things (and by things, we of course mean Denny)? And what happens when the interns' surgical experimenting goes horrifically wrong?

We've had a look at the photo gallery, now here are a pair of promos for Thursday's Grey's Anatomy, entitled "In the Midnight Hour." Sneak peeks still to come ...

[video url="http://www.tvfanatic.com/videos/in-the-midnight-hour-promo-1/" title="In the Midnight Hour Promo #1"] [/video]

What do you think? Share your thoughts, then follow the jump for a second, slightly different preview of this drama-packed episode, the ninth of Season Five ...

[video url="http://www.tvfanatic.com/videos/in-the-midnight-hour-promo-2/" title="In the Midnight Hour Promo #2"] [/video]

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