We can't be bothered to wait until Monday, October 29 for the next episode of Gossip Girl — Season 6, Episode 4 "Portrait of a Lady Alexander." So, we were thrilled when we came across this Producers' Preview of the episode. "Blair (Leighton Meester) loves a mystery," co-producer Matt Whitney says, "so she's put Waldorf designs aside" to help Chuck (Ed Westwick) on his mission. Who else is changing things up this episode? Watch and see.