Serena and Dan decide to make amends with those they have wronged. Chuck is close to getting the evidence he needs against his father, but a close ally reveals his plan.

Cast: Blake Lively, Leighton Meester, Penn Badgley, Chace Crawford, Ed Westwick, Kaylee DeFer, Kelly Rutherford, Matthew Settle, William Baldwin, Sofia Black-D'Elia, Robert John Burke, Yin Chang, Zuzanna Szadkowski, Michelle Trachtenberg, Patrick Boll