. "Blair Waldorf Must Pie is the 9th episode of the first season and the 9th overall."@en . . . "Mark Piznarski"@en . . . "1"^^ . "2007-11-28"^^ . "9"^^ . . "Blair Waldorf Must Pie is the 9th episode of the first season and the 9th overall."@en . "The Humphreys and van der Woodsens share Thanksgiving!"@en . . "Blair Waldorf Must Pie"@en . . "Jessica Queller, K.J. Steinberg"@en .