<P> Serena tells Dan that he needs to stay away from Blair . Louis comes to see her and they hang up . </P> <P> Charlie comes to see Nate . Nate tells her about Max coming to sell Charlie's story . Nate expresses that he might not go to the weekend trip with his grandfather . Charlie reassures him that he earned his job . </P> <P> Lily go to Chuck and asks if he is okay with Blair . She tells him to come to talk to her whenever he feels something for Blair . Chuck says that he doesn't want her to have to bear that burden . Lily says that she's always loved Chuck as her own and she hopes he can feel that love for someone some day . </P> <P> Louis expresses his concern for Blair to Serena . Serena tells him he needs to stop scheming in order to be with Blair and gives him her location . </P>

What episode is blair and chuck's car crash