This is just getting strange.

In the sneak preview below from tonight's episode of Grey's Anatomy, "In the Midnight Hour," there are some, um, amorous noises coming from Izzie's room, but Alex isn't exactly in there.

Naturally, Meredith, Alex and Derek are all rather confused ...

[video url="http://www.tvfanatic.com/videos/what-are-you-doing-out-here/" title="What Are You Doing Out Here?"][/video]

Follow the jump for three more clips from the episode, in which the rebellious interns get into a whole mess of trouble (in large part because Lexie Grey tries to impress Sadie) ...

[video url="http://www.tvfanatic.com/videos/solo-surgery-time/" title="Solo Surgery Time"][/video]

[video url="http://www.tvfanatic.com/videos/we-could-take-out-his-appendix/" title="We Could Take Out His Appendix"][/video]

[video url="http://www.tvfanatic.com/videos/take-that-crazy-look-off-your-face/" title="Take That Crazy Look Off Your Face"][/video]

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