SUNDAY, DECEMBER 9

"GOSSIP GIRL" � (6:00-7:00 p.m. ET)

"Blair Waldorf Must Pie!" (TV-14, DL) (HDTV)

THE HUMPHREYS AND VAN DER WOODSENS SHARE THANKSGIVING � When Dan (Penn Badgley) hears that Serena (Blake Lively) and her family are spending Thanksgiving alone at The Palace, he naively invites them to spend the holiday with his family, creating an uncomfortable situation for Rufus (Matthew Settle) and Lily (Kelly Rutherford) whose children are unaware of their complicated romantic history. Meanwhile, Blair's (Leighton Meester) emotions spiral out of control when she learns that her father isn't coming home for Thanksgiving. Nate (Chace Crawford) spends the holiday with his mom (guest star Francie Swift) and dad (guest star Sam Robards), but their awkward dinner quickly goes from bad to worse. Taylor Momsen also stars. The episode was directed by Mark Piznarski and written by K.J. Steinberg & Jessica Queller (#108).