Gossip Girl (2007): Season 4, Episode 21 - ProjectFreeTV

4 - 21: Shattered Bass

Jack Bass returns to the Upper East Side and helps Chuck, instead of helping Raina destroy him, as he prefers to be the only one to torture his nephew. Meanwhile, Blair receives Princess Sophie's (guest star Joanne Whalley) approval to marry Louis (guest star Hugo Becker), after Cyrus (guest star Wallace Shawn) impresses her at a party thrown by Eleanor Waldorf (guest star Margaret Colin). At Blair's party, Serena confronts Charlie about wearing her clothes without permission, in turn causing Dan to leave with Charlie. They then attend a Constance Billard/St. Judes alumni event together, where they run into former Constance mean girls Isobel (guest star Nicole Fiscella) and Kati (guest star Nan Zhang). Chuck, Jack and Nate discover the truth about the fire and tell Russell that if he leaves New York for good, they will keep the secret from Raina. After Raina tells Nate that she won't stop until she makes Chuck feel the pain she has, Nate tells her the truth. Thinking Chuck told her, Russell lures Blair to the rooftop of Constance. Rufus discovers that Charlie has not taken her medication and shows Serena and Vanessa.