The story of Stargate SG-1 begins about a year after the events of the feature film, when the United States government learns that an ancient alien device called the Stargate can access a network of such devices on a multitude of planets. SG-1 is an elite Air Force special operations team, one of more than two dozen teams from Earth who explore the galaxy and defend against alien threats such as the Goa'uld, Replicators, and the Ori.
The worst episode of "Stargate SG-1" is "The Enemy Within", rated 5.9/10 from 2064 user votes. It was directed by Mario Philip Azzopardi, Dennis Berry and written by Brad Wright. "The Enemy Within" aired on 8/1/1997 and is rated 0.1 point(s) lower than the second lowest rated, "There But For the Grace of God".
Major Kawalsky is possessed by a Goa'uld, and the SGC must find a way to remove it without killing him.
Director: Mario Philip Azzopardi, Dennis Berry
Writer: Brad Wright
An alien artifact transports Daniel to an alternate reality, where he is not a part of the Stargate program and the Goa'uld -- led by Teal'c -- are invading Earth.
Director: David Warry-Smith
Writer: Robert C. Cooper
General Hammond and the Pentagon reveal the existence of the Stargate to other world governments, and must defend the fact that the program is operated by the United States military.
Director: William Gereghty, Bill Gereghty
Writer: Joseph Mallozzi, Paul Mullie
Members of SG-1 become infected with an alien virus that turns them into primitive beings. Dr. Fraiser must find a cure to save the team and the alien population from whom it was contracted.
Director: Jeff Woolnough, Bill Gereghty
Writer: Jonathan Glassner
Earth provides sanctuary for Vala's estranged, con artist father after he provides intel about a Jaffa plot to attack the planet.
Director: Peter DeLuise
Writer: Paul Mullie, Joseph Mallozzi
The SG-1 team attempt to rescue Teal'c's son, who has been kidnapped and brainwashed by Apophis. Teal'c learns disturbing news about his wife.
Director: Bill Gereghty, William Gereghty
Writer: Katharyn Powers
A group of primitive aliens begin to fall deathly ill after SG-1 arrives.
Director: Bill Corcoran
Writer: John Sanborn, Michael Kaplan
The impending wedding of his son is the least of Teal'c's worries when the Hak'tyl plan an uprising against the Goa'uld Moloc, driving a wedge between Teal'c and Ishta.
Director: Andy Mikita
Writer: Christopher Judge
Jackson becomes addicted to the effects of a Goa'uld sarcophagus, and falls for the planet's manipulative princess.
Director: David Warry-Smith
Writer: Damian Kindler, Robert C. Cooper
Cassandra mysteriously falls ill, sending SG-1 back to her home planet -- where they uncover a dark Goa'uld secret.
Director: Peter DeLuise
Writer: Heather E. Ash
SG-1 investigates a secret N.I.D. laboratory, where a ruthless scientist has used cloning technology to create a Goa'uld-human hybrid.
Director: Amanda Tapping
Writer: Michael Shanks
SG-1 finds a medieval Christian society terrorized by Sokar and the Unas, and is accused of being possessed by demons.
Director: Peter DeLuise
Writer: Carl Binder
SG-1 finds a deserted Goa'uld palace, where a beautiful device causes suicidal tendencies.
Director: Peter F. Woeste
Writer: James Taylor Phillips
The team returns to Earth with a piece of technology that allows them to see alien creatures everywhere, and must attempt to contain the problem when it spreads beyond the base.
Director: Peter F. Woeste
Writer: Damian Kindler, Ron Wilkerson
The team finds a fugitive colony of Jaffa women, who must prey on other Jaffa to acquire symbiotes.
Director: Peter DeLuise
Writer: Christopher Judge
The newly-elected president is debriefed about the Stargate program, and Vice President Kinsey makes a new play for control of the program.
Director: Peter F. Woeste
Writer: Joseph Mallozzi, Paul Mullie
A tour of an off-world research base for a group of foreign diplomats turns dangerous when an insidious insect species gets loose.
Director: Ken Girotti
Writer: Paul Mullie, Joseph Mallozzi
Teal'c discovers a world where people are being savagely attacked by an elusive creature, leading SG-1 to a stunning discovery about its potential origin.
Director: William Waring
Writer: Damian Kindler
An alien civilization is forced to reconsider their views on women when Carter rebels against their social customs.
Director: Jeff Woolnough, Dennis Berry
Writer: Brad Wright, Katharyn Powers
SG-1 is imprisoned in a virtual reality realm and forced to relive the worst moments of their lives over and over.
Director: Martin Wood
Writer: Brad Wright, Jonathan Glassner
Daniel is stranded on another planet after the team's arrival on an alien world sparks a violent civil war.
Director: Peter F. Woeste
Writer: Damian Kindler
When SG-1 travels to an Asgard Protected Planet, Colonel Mitchell is accused of a murder he did not commit.
Director: William Waring
Writer: Paul Mullie, Joseph Mallozzi
Teal'c returns to Chulak to stop his people from implanting his son with a larval Goa'uld.
Director: Jonathan Glassner, Mario Philip Azzopardi
Writer: Robert C. Cooper, Jeff King
A mysterious affliction wipes out the entire population of a planet, plus an SG team -- except for one young girl. Carter befriends her, but learns that she is being used by the Goa'uld.
Director: Mario Philip Azzopardi, Brad Turner
Writer: Robert C. Cooper, Jonathan Glassner
Teal'c is infected with deadly venom from a giant insect, and begins a terrible transformation. When he escapes the S.G.C., SG-1 must find him before Colonel Maybourne does.
Director: David Warry-Smith
Writer: Robert C. Cooper