"Branch Wars" is the tenth episode of the fourth season of the American comedy television series The Office—the show's sixty-third episode overall. Written by Mindy Kaling and directed by Joss Whedon, the episode originally aired in the United States on November 1, 2007, on NBC. The episode marks the return of season three recurring actor Rashida Jones, who plays Jim's former girlfriend Karen Filippelli, now Regional Manager of Dunder Mifflin Utica.