S4, E12: A former associate of Chuck's father, Russell Thorpe (recurring guest star MICHAEL BOATMAN – The Good Wife, Spin City, Arli$$) - along with his daughter, Raina (recurring guest star TIKA SUMPTER – One Life to Live) - returns to Manhattan with some unfinished business for our Upper East Siders. Plus, Serena and Chuck join forces against Lily, and Blair realizes that her mother, Eleanor (recurring guest star MARGARET COLIN), may be the key to her becoming a future CEO. Meanwhile, Nate worries that his father, the Captain (recurring guest star SAM ROBARDS), is having a little too much fun and not taking his parole seriously.