Extended Grey's Anatomy-Private Practice Promo For Thursday

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During last night's Brothers & Sisters episode, ABC ramped up its promo for the Grey's Anatomy-Private Practice crossover event this Thursday with a 45-second advertisement.

While we've seen a lot of these snippets from the much anticipated 2010 debuts of both Shonda Rhimes series already, they've never been packaged quite this dramatically.

Or in the case of Mark and Alex, nakedly.

The promo for "Blink" and "Another Second Chance" leaves little doubt that more than one relationship may be in peril along with the life of Mark's pregnant daughter.

If you missed it, we posted a huge photo gallery for both episodes as well as five sneak previews this weekend. Check out the promo below and share your comments:

[video url="http://www.tvfanatic.com/videos/greys-anatomy-private-practice-extended-promo/" title="Grey's Anatomy-Private Practice Extended Promo"] [/video]

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

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Grey's Anatomy Quotes

Did you say it? 'I love you. I don't ever want to live without you. You changed my life.' Did you say it? Make a plan. Set a goal. Work toward it, but every now and then, look around; Drink it in 'cause this is it. It might all be gone tomorrow."

Meredith (closing voiceover)

Arizona: Oh my God! I mean, I understand why you're into her. She's hot. Wait, she likes you?
Nathan: What? I mean, I'm going to try not to be offended at that.
Arizona: No, no, no. It's just that Derek was--Derek was epic for her. They were the great love story. I mean, that girl's heart beat for Derek Shepherd. It just...it never occurred to me that she would ever be with anyone else. He was perfect. He was everything. That man turned her world. It...I spooked you. Don't be spooked.