Rufus called Dan and told Dan not to tell Serena about Lily and Rufus's child, Lily will tell Eric and Serena on her own. Rufus and Lily are leaving town to go look for their son. So Dan doesn't tell her. Chuck is on the rooftop, Jack and Blair try to get him down ( well Blair does). Chuck says that no one cares about him, Blair says that she cares and offers her hand to help him down the roof. He takes it and she helps him down they hug and he apoligizes to her. Chuck gets in the limo and Blair tells Jack not to tell Chuck about what happened on New Years.
No one knows what happened on New Years...I'm assuming that they had sex. The roof scene was good!