after series star David Duchovny announced his intention to leave the show. During the eighth and ninth seasons, Gish and fellow newcomer Robert Patrick became the show's principal characters and it was presumed that the two could carry on the show even after Gillian Anderson left. While it is generally agreed their performances were good, ratings continued to drop with the departure of Duchovny and his dynamic partnership with Gillian Anderson; the ninth season of The X-Files became the show's last until 2016. She guest-starred on The West Wing playing Elizabeth Bartlet Westin, eldest daughter of President Josiah Bartlet (Martin Sheen), first appearing in 2003. In 2006, Gish played the role of Julia in the independent movie The Celestine Prophecy and costarred in Candles on Bay Street alongside Eion Bailey and Alicia Silverstone. The same year she landed a lead role in the Showtime drama Brotherhood as Eileen Caffee, and appeared in 29 of the 33 episodes in the series's three-season run. Gish played Jo Noonan in the A&E TV miniseries Stephen King's Bag of Bones in 2011. Also in 2011, she played the role of Anne Sullivan, a mysterious therapist in Pretty Little Liars. In 2012, she made a guest appearance in 12th season of the CBS crime drama CSI: Crime Scene Investigation. The same year she co-starred on the ABC drama pilot Americana as the mother of Ashley Greene's character. However, the pilot was not picked up. From 2013 to 2014, Gish was part of the main cast in the FX series The Bridge, in which she played Charlotte Millwright, a widow who discovers that her recently deceased husband had secrets on both sides of the US-Mexican border. She had a guest-starring role on Sons of Anarchy as Lt. Althea Jarry of the San Joaquin County Sheriff's Department, in 2014. The following summer, it was announced Gish would return as Monica Reyes in the upcoming The X Files revival, appearing in episode 6 of season 10, and reprising her role in the eleventh season. She co-starred with Kate Bosworth, Thomas Jane and Dash Mihok in the 2016 thriller film Before I Wake. Gish appeared as drug lord Alice Sands in three episodes of the TNT Rizzoli & Isles series, in 2016. Two years later she had a recurring role as the caretaker Mrs. Dudley in the Netflix series The Haunting of Hill House, based loosely off of Shirley