Enemies: This thrilling, action-packed episode sees the Stargate team fighting to stay alive in the face of the advancing Apophis and Replicators. (S5, ep 1) [S]
Double Jeopardy: In an episode that marks the directorial debut of Michael Shanks, problems arise for SG-1 when an old acquaintance comes looking for help. (S4, ep 21) [S]
Prodigy: Carter tries to motivate a promising young cadet by taking her through the Stargate. But a seemingly routine excursion turns deadly when they are attacked by aliens. (S4, ep 19) [S]
2010: Ten years have passed since an alien race known as the Aschen saved Earth and cured cancer but Carter discovers the awful truth behind this seemingly infallible race. (S4, ep 16) [S]
Beneath the Surface: SG-1 awaken in a mine with no recollection of their former lives. Jonah, Therra, Carlin and Tor - as they are now known - have a new set of memories. (S4, ep 10) [S]
Window of Opportunity: During one of the funniest episodes ever made, Jack O'Neill and Teal'c relive the same day over and over after being exposed to a strange alien device. (S4, ep 6) [S]
Crossroads: An incoming traveller, identified as a Jaffa priestess with whom Teal'C once had a relationship, claims to know how to destroy the Goa'uld. (S4, ep 4) [S]
Out Of Mind: 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) [S]
One False Step: 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) [S]
Serpent's Song: 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) [S]
The Fifth Race: 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) [S]
A Matter Of Time: 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) [S]
Touchstone: 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) [S]
Spirits: 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) [S]
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) [S]
Secrets: 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) [S]
Thor's Chariot: 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) [S]
Prisoners: 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) [S]
Serpent's Lair: 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) [S]