Herbert Duncanson Herbert appeared on four episodes of Stargate SG1 playing Douglas Anders/Grell (Wormhole X-Treme! & 200), SF guard (Allegiance) and Guard (Beast of Burden). He appeared in some archive footage and did some stand in work on Stargate Continuum and The Ark of Truth. He’s guest starred on The Collector, Human Target, Jake 2.0, [...]