Below are five more sneak previews of Thursday's episode, "Wish You Were Here."

As seen in our first sneak peek, a serial killer, played by Eric Stoltz, is transported to the hospital. Bailey is thrown off by a new doctor, Arizona Robbins (Jessica Capshaw), and Mark laments his recent romantic woes to Callie. He's determined not to sleep with Lexie again, but he definitely adores her. Finally, Izzie tells Alex about Denny ... with surprising results.

Here's a great clip of Mark and Callie discussing their respective love lives ...

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Funny stuff. Follow the jump for four more video clips from this week's long-awaited (and hopefully promising) episode of Grey's Anatomy, the first of 2009 ...

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[video url="http://www.tvfanatic.com/videos/wish-you-were-here-sneak-preview-4/" title="Wish You Were Here Sneak Preview #4"][/video]

[video url="http://www.tvfanatic.com/videos/wish-you-were-here-sneak-preview-5/" title="Wish You Were Here Sneak Preview #5"][/video]

[video url="http://www.tvfanatic.com/videos/wish-you-were-here-sneak-preview-6/" title="Wish You Were Here Sneak Preview #6"][/video]

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