Grey's Anatomy Episode Stills: "Holidaze"Steve Marsi at .
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 ...
Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.