Question: American actor and producer, as well as series eight regular in Stargate SG-1, began his television career playing who in the series General Hospital?

<P0-S0>  The eighth season concluded on February 22, 2005, after 20 episodes on British Sky One, which overtook the Sci Fi Channel in mid-season. <P0-S1>  This was the first season of the show to have 20 episodes instead of 22, as well as the first to air concurrently with "Stargate SG-1" spinoff series "Stargate Atlantis" (the first season thereof). <P0-S2>  The series was originally developed by Brad Wright and Jonathan Glassner, while Brad Wright and Robert C. Cooper served as executive producers. <P0-S3>  Season eight regular cast members include Richard Dean Anderson, Amanda Tapping, Christopher Judge, and Michael Shanks. <P0-S4>  The eighth season begins with the SG-1 team trying to revive Colonel Jack O'Neill (Richard Dean Anderson) after the events of the seventh season. <P0-S5>  At the end of the two-episode season opener, Colonel O'Neill is promoted to General and assumes command of Stargate Command (SGC), while Major Samantha Carter (Amanda Tapping) is promoted to Lieutenant Colonel and assumes command of SG-1. <P0-S6> Season eight of "Stargate SG-1", an American-Canadian military science fiction television series, began airing on July 9, 2004 on the Sci Fi channel. <P0-S7>  The season arc centers on the growing threat and seemingly final defeat of the Goa'uld and the Replicators, races who were introduced in the first and third season of the show, respectively. <SEP> <P1-S0>  He began his television career in 1976, playing Dr. Jeff Webber in the American soap-opera series "General Hospital", then rose to prominence as the lead actor in the television series "MacGyver" (1985–1992). <P1-S1>  He later appeared in films such as "Through the Eyes of a Killer" (1992), "Pandora's Clock" (1996), and "Firehouse" (1997). <P1-S2> Richard Dean Anderson (born January 23, 1950) is an American actor and producer. <SEP> <P2-S0> Lieutenant General George S. Hammond, USAF (Ret.) <P2-S1>  is a fictional character in the "Stargate franchise". <P2-S2>  Played by American actor Don S. Davis, General Hammond serves as the commander of Stargate Command (SGC) in the first seven seasons of the television series "Stargate SG-1". <P2-S3>  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. <P2-S4>  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". <SEP> <P3-S0> Stargate: The Ark of Truth is a 2008 Canadian-American military science fiction film in the "Stargate" franchise, acting as a sequel to the television series "Stargate SG-1". <P3-S1>  It is written and directed by Robert C. Cooper, produced by Cooper, John G. Lenic, and the series' creator Brad Wright, and stars its regular cast. <P3-S2>  The film is the conclusion of the Ori arc, and picks up after the" SG-1" series finale. <P3-S3>  However, it takes place before the Stargate Atlantis third season finale.