

The Atlantis expedition team, led by Dr. Elizabeth Weir, arrives in the Pegasus Galaxy and discovers the lost city of Atlantis. They encounter a powerful new enemy, the Wraith, and face various challenges to protect their new home while exploring the galaxy and seeking new allies.
All episodes — Season 1
S1 E1Rising (1)
Jul 15, 20048.245 min
A new Stargate team embarks on a dangerous mission to a distant galaxy, where they discover a mythical lost city -- and a deadly new enemy.
S1 E2Rising (2)
Jul 15, 2004841 min
Sheppard tries to convince Weir to mount a rescue mission to free Colonel Sumner, Teyla, and the others captured by the Wraith.
S1 E3Hide and Seek
Jul 23, 20047.144 min
The Atlantis base is threatened when the team discovers that an alien entity is in the city. McKay's experiment with alien technology goes awry.
S1 E4Thirty Eight Minutes
Jul 30, 20047.344 min
The team finds themselves in mortal danger when their Puddle Jumper ship becomes lodged in the Stargate.
S1 E5Suspicion
Aug 6, 2004748 min
After a series of run-ins with the Wraith, the team begins to suspect their Athosian allies of having a spy in their midst.
S1 E6Childhood's End
Aug 13, 20046.444 min
Sheppard and the team visit a world where no one is over 24 years old -- because of a ritual suicide practice they believe keeps the Wraith at bay.
S1 E7Poisoning the Well
Aug 20, 20047.442 min
The team finds a world whose people are on the brink of a discovery that may make them immune to the Wraith feeding.
S1 E8Underground
Aug 27, 20047.344 min
Efforts to open trade relations with a species called the Genii turn sour when the team discovers their new "allies" have ulterior motives.
S1 E9Home
Sep 10, 20047.142 min
McKay's efforts to harness the energy of an alien planet's atmosphere allows for a return trip to Earth -- but the team may not be able to return to Atlantis.
S1 E10The Storm (1)
Sep 17, 20047.742 min
When a massive storm threatens the city, Atlantis is evacuated, only to be taken over by the team's newest enemy.
S1 E11The Eye (2)
Nov 8, 20048.142 min
Major Sheppard plays a dangerous game of cat and mouse with soldiers who have seized control of Atlantis and taken Weir and McKay hostage.
S1 E12The Defiant One
Nov 15, 20047.742 min
Sheppard's team investigates a downed Wraith ship, and find themselves stuck on a planet with a lone Wraith survivor.
S1 E13Hot Zone
Nov 22, 20047.342 min
Nearly a third of Atlantis's residents are infected with a deadly virus that causes hallucinations and death, forcing a lockdown of the city.
S1 E14Sanctuary
Nov 29, 20047.244 min
The team finds a paradise world that would make an ideal sanctuary for those fleeing from the Wraith, but the local inhabitants believe their goddess will not permit it.
S1 E15Before I Sleep
Dec 6, 20047.842 min
A woman is found in suspended animation in Atlantis, and the team is shocked to see that it is Dr. Weir herself, who tells them of her trip 10,000 years into the city's past.
S1 E16The Brotherhood
Jan 3, 20057.444 min
The team searches for a valuable Zero Point Module rumored to be hidden on the planet Dagan. But their new allies have motives of their own.
S1 E17Letters From Pegasus
Jan 10, 20057.444 min
Given a brief opportunity to send a data transmission to Earth, members of the Atlantis expedition compose video messages home to their loved ones.
S1 E18The Gift
Jan 17, 20056.842 min
Plagued by terrifying nightmares, Teyla begins to recall a time when she and her father were captured by the Wraith and subjected to disturbing experiments.
S1 E19The Siege (1)
Jan 24, 20058.144 min
With a group of Wraith hive ships on the way to Atlantis, the team searches for a place to flee and a way to destroy the city. McKay leads a team to try and activate the Ancients' orbital weapons platform.
S1 E20The Siege (2)
Jan 31, 20058.444 min
All hope seems lost, until Colonel Everett arrives suddenly from Earth. He is determined to defend the city until the arrival of a ZPM, brought by a new ship.