Step through the stargate with SG-1, a team of soldiers and
scientists, as they travel instantaneously to other planets to explore,
forge alliances, defuse crises, establish trade, investigate ancient
mysteries, and defend Earth from such hostile forces as the Goa'uld,
the Replicators, and the Ori.
For eight years, from their base at the U.S. Air Force's Stargate Command in the Rocky Mountains, Gen. Jack O'Neill (Richard Dean Anderson), Dr. Daniel Jackson (Michael Shanks), Lt. Col. Samantha Carter (Amanda Tapping), and alien warrior Teal'c (Christopher Judge) have braved everything that the universe has thrown at them, from interstellar war and evil twins to death and ascension.
But changes came to SG-1 as it began its ninth year of fearless service to Earth. New faces joined the team: Cameron Mitchell (Ben Browder)
will try to fill the very big shoes of former SG-1 leader O'Neill (who
is now in charge in Homeworld Security), while Gen. Hank Landry (Beau Bridges) must adapt to the unique challenges of running Stargate Command, a posting unlike any other the military has to offer.
As the team embarks upon its tenth year, Vala (Claudia Black),
a former Goa'uld host turned freedom-fighter, joins them in their
battle to defend the galaxy from the holy war of the Ori. Meanwhile,
relations between the Jaffa and Earth continue to be strained by the
political maneuvering of Gerak (Louis Gossett Jr.), a Jaffa leader whose rise to power has put him into conflict with Teal'c.