Cast Credits First Wave (1998) Guest starring as Clown Episode 2x10: The Heist (Jun 18, 2000) Stargate SG-1 (1997) Guest starring as Vi'Tak Episode 9x16: Off the Grid (Feb 10, 2006) [Co-Star] Millennium (1996) Guest starring as Johnnie Mack Potter Episode 2x21: Somehow, Satan Got Behind Me (May 1, 1998) [Co-Star] Guest starring as Peter Episode 3x04: Closure (Oct 23, 1998)