MISDEEDS OF THE PAST – After a run-in with an increasingly paranoid Bart (guest star Robert John Burke), Blair grows alarmingly concerned for Chuck’s safety. However, feeling confident that his father will never hurt him, Chuck makes a deal that could change his life. Wanting to make things better for Chuck, Blair devises a plan with the help of Serena, Georgina (guest star Michelle Trachtenberg) and Sage (guest star Sofia Black-D’Elia) to try and get what they need out of Bart. Meanwhile, Nate’s financial dilemma finally lands him in a place that he never thought he would be. Penn Badgley and Kelly Rutherford also star. Patrick Norris directed the episode written by Sara Goodman and Natalie Krinsky.