Robert Duncan worked on a variety of projects during his entertainment career. To break into the world of acting, Duncan held roles in films like "New World" (1986) with James Fox and Bernard Hill. Duncan worked in television around the start of his acting career with a role on "Viper" (1993-99). In the nineties, Duncan devoted his time to various credits, such as "Masters of Fantasy: Ray Bradbury: An American Icon" (Syfy, 1995-96), "Understanding the Internet" (PBS, 1995-96) and "Using the Internet" (PBS, 1995-96). He also worked on "Stargate SG-1" (1997-2006). He also appeared in the drama "The Jealous God" (2005) with Jason Merrells. Most recently, Duncan acted on "Terriers" (FX, 2010-11).