and subsequent seasons of the television series Stargate Atlantis. He also appeared in an episode of CSI: Crime Scene Investigation and in 2006 had a regular guest role on Day Break as Robbery/Homicide Detective Spivak. Pileggi also appeared on the Cold Case episode "Offender", as a father accused of molesting and murdering his own son, who then threatens to murder one child sex offender per day until the case is reopened and solved. Pileggi also played the role of Larry Jennings, chairman of the board of the hospital, in Grey's Anatomy. In a first season episode of That '70s Show he played Red Forman's swinger, navy buddy, Bull, alongside his real life wife, Arlene. Pileggi appeared in two episodes of Law and Order: Special Victims Unit as DEA agent Jack Hammond. Since 2008, Pileggi has played Ernest Darby, the head of a white supremacist gang called the "Nordics", in the FX drama Sons of Anarchy . He also played spree killer Norman Hill (AKA The Road Warrior) on a season four episode of Criminal Minds, titled "Normal". Pileggi has also done some voice acting. His voice was featured as the githzerai Dak'kon in the video game Planescape: Torment. He voices Commissioner James Gordon on the Kids' WB series The Batman. Pileggi also hosted the controversial FOX specials Breaking the Magician's Code: Magic's Biggest Secrets Finally Revealed and Conspiracy Theory: Did We Land on the Moon?. He also played the recurring role of Sam and Dean Winchester's maternal grandfather, Samuel Campbell, in the TV series Supernatural. Pileggi starred in the TNT drama series Dallas as Harris Ryland. He was promoted to series regular as of second season. As of 2014, Pileggi is on the advisory board of Sci-Fest, the first annual Los Angeles Science Fiction One-Act Play Festival, held in May 2014. Since 2021, Pileggi has played Bonham Walker, the father of the titular Cordell Walker, in The CW crime drama series Walker reboot. Filmography Films Television Video games Awards and nominations References External links American male film actors American male television actors American male voice actors Living people Male actors from Portland, Oregon University of Texas at Austin alumni Place of birth missing (living people) 20th-century American male actors 21st-century American male actors American male soap opera actors American people of Italian descent People of Calabrian descent 1952 births Audiobook narrators