Watch Gossip Girl Season 3 Episode 20- It’s a Dad, Dad, Dad, Dad World. Will’s return to the Upper East Side continues to stir up problems for Serena, Lily and his long-standing rival, Rufus . Serena and Jenny’s relationship is strained as a result of Jenny’s deception. Blair spends time on the Columbia campus and realizes where she truly belongs. Dan learns that Vanessa has been keeping yet another secret from him.