Grey's Anatomy Episode Stills: "Holidaze"

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This Thursday's episode of Grey's Anatomy, "Holidaze," combines Thanksgiving, Christmas and New Year's - and notably features the arrival of Mark Sloan's long-lost ... daughter.

Yes, a hot, blonde, McSteamy spawn. We'll pause for a moment to let that sink in.

Aside from guest star Leven Rambin (who plays the character from Mark's past, whomever she is), Thatcher Grey and Miranda's as-yet-unseen father also appear in the episode.

Click to enlarge some photos from "Holidaze" below and see what you think ...

Mark Love Child?
Doctor Sloan Pic
Mr. Grey
Younger Grey
Mark's Women
Richard and Mer Picture
Sloan Pic
Owenstina and Teddy
Mark is a Dad?
Oh, Der
Off the Wagon
Owen, Teddy, and Richard
Mer Grey Photo
The Eldest Grey
AZ and Der
Holiday Party

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

MEREDITH: "You don't get to call me a whore. When I met you, I thought I had found the person that I was going to spend the rest of my life with. I was done! All the boys and all the bars and all the obvious daddy issues, who cares? I was done. You left me. You chose Addison. I'm all glued back together now. I make no apologies for how I chose to repair what you broke. You don't get to call me a whore."
DEREK: "This thing with us is finished. It's over."
MEREDITH: "Finally."
DEREK: "Yeah, it's done."
MEREDITH: "It is done."

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.