2.02 "Never Been Marcused"

As Blair struggles to adjust herself to her British boyfriend, Lord Marcus Beaton's ways, he introduces her to his parents, where the identity of Lord Marcus' mother is revealed. At the Beaton party, Chuck tries to make Blair jealous when he shows up with Catherine, Nate's secret love interest. Meanwhile, Nate and Serena get closer while he tries to keep far away from Catherine, while Serena begins to have doubts about re-staring her romance with Dan. Chuck and Marcus Beaton begin an unexpected friendship, and Blair makes a revelation.