A team of explorers made up of soldiers and scientists travels through a Stargate, an ancient portal to other planets. They use the Stargate to explore new worlds, forge ties with friendly civilizations and protect Earth from hostile forces. The TV series is based on the theatrical film `Stargate'.
O'Neill and the SG-1 team find themselves on a suicide mission in an attempt to stop the Earth's destruction by the Goa'uld. (S2, ep 1)
Samantha Carter's body is taken over by an alien who is being hunted by a rival. (S2, ep 2)
After helping a murderer, the SG-1 team is banished to a penal world where an unusual ruler holds the key to their return home. (S2, ep 3)
The SG-1 team members are pulled into a virtual reality loop where they relive terrifying moments in their lives. (S2, ep 4)
Daniel Jackson falls in love with an alien princess who seduces him with the powers of the Goa'uld sarcophagus. (S2, ep 5)
The SG-1 team must help stop a Goa'uld invasion on a planet whose main defence was Thor's hammer - which was destroyed by the team during an earlier visit. (S2, ep 6)
While exploring a dead planet, the SG-1 team brings back an alien orb that takes O'Neill and SG Command hostage. (S2, ep 7)
The SG-1 team mount a rescue mission when Teal'c's son is taken by Apophis. (S2, ep 8)
Daniel Jackson learns that his wife is pregnant with Apophis' child and O'Neill discovers that a reporter is ready to blow the lid off the top-secret Stargate project. (S2, ep 9)
While exploring a new planet, Teal'c is stung by a giant insect and begins a terrifying transformation. (S2, ep 10)
The Tok'ra - Part 1: Samantha Carter has a vision that leads to a meeting with the Tok'ra, a powerful group of Goa'uld rebels. (S2, ep 11)
The Tok'ra - Part 2: Samantha Carter's father, facing certain death due to cancer, agrees to become a host for one of the Tok'ra - the sworn enemies of the Goa'uld System Lords. (S2, ep 12)
Plans by Stargate Command and the NID to mine a planet populated by Coast Salish Indians run into trouble due to the mysterious spirits who protect the planet. (S2, ep 13)
While attempting to return a stolen weather device to the planet of Madrona, O'Neill and the SG-1 team uncover a government agenda that has sinister implications. (S2, ep 14)
When O'Neill looks into an alien viewer, he becomes a receptacle for ancient knowledge which could unlock some of life's deepest mysteries. (S2, ep 16)
While trying to save fellow Stargate officers from a black hole, the SG-1 team and Earth become threatened by the hole's potentially fatal gravitational pull. (S2, ep 15)
Daniel falls victim to an invention that swaps his body with that of a dying man. (S2, ep 18)
When SG-1's mortal enemy Apophis seeks sanctuary in the command centre, his presence unleashes an ancient spirit whose wrath threatens to destroy everyone. (S2, ep 17)
SG-1's presence in an alien community causes a wave of illness, which threatens to wipe out the entire alien civilisation. (S2, ep 19)
In a war of attrition against the Goa'ulds, a race of invisible aliens plots to kill all of mankind. (S2, ep 20)
The SG-1 team travel back in time and find their fate resting in the hands of a much younger General Hammond. (S2, ep 21)
O'Neill awakens in a futuristic world where an unfamiliar Stargate team tell him he has been frozen for eight decades and the members of SG-1 are long dead. (S2, ep 22)