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Donald Sinclair Davis (August 4, 1942 – June 29, 2008) 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. Wikipedia