<P> In "The Princess and the Frog" he learns that Blair's relationship with Louis is serious, and that there is talk about them getting engaged . He gets drunk and embarrasses Blair in front of Louis' mother, and later tries to force himself on her, while pushing her down and smashing a glass window right next to her face, after she tells him about her engagement . Blair ends up with her cheek being cut . </P> <P> Later, Blair is kidnapped by Russell, but Chuck saves her, and the two go to a Bar Mitzah . There, the two are seen dancing and smiling happily . Blair pulls him off the dance floor into a private room and the two have sex . Blair decides she is going to leave Louis, but Chuck stops her, telling her that she needs to be with Louis because he makes her happy . At the end of the episode, Chuck decides to spend the summer traveling with Nate . </P> <P> Following the 20th episode of Season 4, Safran spoke on behalf of the series regarding the scene in which Chuck became violent with Blair . </P> <Table> <Tr> <Td> "</Td> <Td> The way we viewed it, I think it's very clear that Blair is not afraid in those moments, for herself . They have a volatile relationship, they always have, but I do not believe--or I should say we do not believe--that it is abuse when it's the two of them . Chuck does not try to hurt Blair . He punches the glass because he has rage, but he has never, and will never, hurt Blair . He knows it and she knows it, and I feel it's very important to know that she is not scared--if anything, she is scared for Chuck--and what he might do to himself, but she is never afraid of what he might do to her . Leighton and I were very clear about that . </Td> <Td>" </Td> </Tr> </Table>

When does chuck find out bart is alive