Stargate SG-1 
A secret military team, SG-1, is formed to explore other planets through the recently discovered Stargates.
Stargate SG-1: The Nox Rewatch Season 1, Episode 7
With the Stargate program in danger of being terminated, the team is under pressure to find new technology. Visiting a planet where they believe there is a creature that possesses the secret of invisibility, they encounter Apophis and his guards. Both sides receiving mortal wounds, they are aided by the planet's inhabitants, the Nox, a gentle people with a very large secret.
Stargate SG-1: Cold Lazarus Rewatch Season 1, Episode 6
While searching a yellow desert planet, the SG-1 team finds a pit filled with broken blue crystals. When Colonel Jack O'Neill wanders off alone and touches one, he is blasted backward and knocked unconscious. A duplicate of himself is created to examine the Tau'ri, and it returns to Earth with the rest of the SG-1 team, who believe it is the real O'Neill. The duplicate O'Neill explores O'Neill's past life outside of the Stargate Command complex, and it soon becomes an unwitting threat to society.
Stargate SG-1: The First Commandment Season 1, Episode 5
SG-1 is sent on a mission to find the mysteriously missing SG-9 team. O'Neill then discovers that Carter's former fiancé thinks he's a god and reigns as a brutal tyrant on the planet. [more inside]
Stargate SG-1: The Broca Divide Rewatch Season 1, Episode 4
The Stargate base is put in deadly peril when it is contaminated with a dangerous infection which causes its victims to become mindlessly animalistic brutes. [more inside]
Stargate SG-1: Emancipation Rewatch Season 1, Episode 3
While exploring a world populated by Mongol descendants, Capt. Carter is abducted for a wife of a local warlord. [more inside]
Stargate SG-1: S1.E2 ∙ The Enemy Within Season 1, Episode 2
Doctors discover that a Goa'uld larva has attached itself to Kawalsky's brain, leaving Jack's friend needing to undergo a risky operation to stop the alien parasite from taking over and escaping Earth. [more inside]
Stargate SG-1: Children of the Gods Rewatch Season 1, Episode 1
Colonel Jack O'Neill is brought out of retirement to lead a new expedition back to Abydos, only to find an old friend, a new enemy and a far wider use of the Stargate.