Ben’s (guest star David Call) mother (guest star Marsha Dietlein Bennett) comes to town, forcing issues to the surface between Ben and Serena. Russell Thorpe (guest star Michael Boatman) is determined to destroy Chuck’s family legacy, but he risks alienating his daughter, Raina (guest star Tika Sumpter), in the process. Billy Baldwin returns as William van der Woodsen, Lily’s ex-husband and Serena and Eric’s father.