1x02 The Wild Brunch

Blair reveals to Serena that she knows about her past transgressions with her boyfriend, Nate Archibald, before she left town and gives her the cold shoulder. Meanwhile, Chuck Bass's father Bart hosts a fundraiser brunch and Serena shows up with Dan Humphrey raising the fire of Chuck and Blair. Dan's sister, Jenny, also makes inroads with the in-crowd when Blair befriends her and takes her under her wing.