Donald Sinclair Davis was an American character actor best known for playing General Hammond in the television series Stargate SG-1 (1997–2007), and earlier for playing Major Garland Briggs on the television series Twin Peaks (1990–1991). In animation, he was also known as Wild Bill in the 2003 direct-to-video animated movie G.I. Joe: Spy Troops and its 2004 sequel, G.I. Joe: Valor vs. Venom. He was also a theater professor, painter, and United States Army captain.

Lieutenant General George S. Hammond, USAF (Ret.) is a fictional character in the Stargate franchise. Played by American actor Don S. Davis, General Hammond serves as the commander of Stargate Command (SGC) in the first seven seasons of the 1997 television series Stargate SG-1. He is relieved of command in the series' season 7 finale "Lost City", but becomes head of the new Homeworld Security department at the beginning of season 8. Hammond's off-screen retirement is confirmed in SG-1's season 10, and the character's death is mentioned in the series finale of SG-1's spin-off series Stargate Atlantis, "Enemy at the Gate".