99 Available, 100 Aired
Last Aired S05E20 on Jan 09, 2009
99 episodes available of 100 aired
7.6 (145 Ratings)
60 Min

With the Ancients' city of Atlantis discovered in the Pegasus Galaxy by Stargate Command, Dr. Elizabeth Weir and Major Sheppard lead a scientific expedition to the ancient abandoned city. Once there, the team not only find themselves unable to contact Earth, but their explorations unexpectedly reawaken the Ancients' deadly enemies, The Wraith, who hunger for this new prey. Now with the help of newfound local allies like Teyla Emmagan, the Atlantis Team sets about to uncover their new home's secrets even as their war of survival against the Wraith begins.

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All Stargate Atlantis (2004) Episodes

Stargate Atlantis Seasons

  1. Watch Stargate Atlantis Season 5 S05
    20 of 20 Ep. Available 2008
  2. 20 of 20 Ep. Available 2007
  3. 20 of 20 Ep. Available 2006
  4. 20 of 20 Ep. Available 2005
  5. 19 of 20 Ep. Available 2004

Stargate Atlantis Episodes

  1. 20 Watch Stargate Atlantis S05E20 online - Enemy at the Gate
    Available Aired on Jan 09, 2009
  2. 19
    Available Aired on Dec 19, 2008
  3. 18
    Available Aired on Dec 12, 2008
  4. 17
    Available Aired on Dec 05, 2008
  5. 16
    Available Aired on Nov 21, 2008
  6. 15
    Available Aired on Nov 14, 2008
  7. 14
    Available Aired on Nov 07, 2008
  8. 13
    Available Aired on Oct 20, 2008
  9. 12
    Available Aired on Oct 17, 2008
  10. 11
    Available Aired on Oct 10, 2008
  11. 10
    Available Aired on Sep 26, 2008
  12. 9
    Available Aired on Sep 19, 2008
  13. 8
    Available Aired on Sep 12, 2008
  14. 7
    Available Aired on Sep 05, 2008
  15. 6
    Available Aired on Aug 22, 2008
  16. 5
    Available Aired on Aug 15, 2008
  17. 4
    Available Aired on Aug 01, 2008
  18. 3
    Available Aired on Jul 25, 2008
  19. 2
    Available Aired on Jul 18, 2008
  20. 1
    Available Aired on Jul 11, 2008
  1. 20
    Available Aired on Mar 07, 2008
  2. 19
    Available Aired on Feb 29, 2008
  3. 18
    Available Aired on Feb 22, 2008
  4. 17
    Available Aired on Feb 15, 2008
  5. 16
    Available Aired on Feb 08, 2008
  6. 15
    Available Aired on Feb 01, 2008
  7. 14
    Available Aired on Jan 25, 2008
  8. 13
    Available Aired on Jan 18, 2008
  9. 12
    Available Aired on Jan 11, 2008
  10. 11
    Available Aired on Jan 04, 2008
  11. 10
    Available Aired on Dec 07, 2007
  12. 9
    Available Aired on Nov 30, 2007
  13. 8
    Available Aired on Nov 16, 2007
  14. 7
    Available Aired on Nov 09, 2007
  15. 6
    Available Aired on Nov 02, 2007
  16. 5
    Available Aired on Oct 26, 2007
  17. 4
    Available Aired on Oct 19, 2007
  18. 3
    Available Aired on Oct 12, 2007
  19. 2
    Available Aired on Oct 05, 2007
  20. 1
    Available Aired on Sep 28, 2007
  1. 20
    Available Aired on Feb 05, 2007
  2. 19
    Available Aired on Jan 29, 2007
  3. 18
    Available Aired on Jan 15, 2007
  4. 17
    Available Aired on Jan 12, 2007
  5. 16
    Available Aired on Jan 08, 2007
  6. 15
    Available Aired on Dec 18, 2006
  7. 14
    Available Aired on Dec 11, 2006
  8. 13
    Available Aired on Dec 04, 2006
  9. 12
    Available Aired on Nov 27, 2006
  10. 11
    Available Aired on Nov 20, 2006
  11. 10
    Available Aired on Sep 22, 2006
  12. 9
    Available Aired on Sep 15, 2006
  13. 8
    Available Aired on Sep 08, 2006
  14. 7
    Available Aired on Aug 25, 2006
  15. 6
    Available Aired on Aug 18, 2006
  16. 5
    Available Aired on Aug 11, 2006
  17. 4
    Available Aired on Aug 04, 2006
  18. 3
    Available Aired on Jul 28, 2006
  19. 2
    Available Aired on Jul 21, 2006
  20. 1
    Available Aired on Jul 14, 2006
  1. 20
    Available Aired on Jan 30, 2006
  2. 19
    Available Aired on Jan 23, 2006
  3. 18
    Available Aired on Jan 16, 2006
  4. 17
    Available Aired on Jan 09, 2006
  5. 16
    Available Aired on Jan 02, 2006
  6. 15
    Available Aired on Dec 19, 2005
  7. 14
    Available Aired on Dec 10, 2005
  8. 13
    Available Aired on Dec 05, 2005
  9. 12
    Available Aired on Nov 28, 2005
  10. 11
    Available Aired on Nov 16, 2005
  11. 10
    Available Aired on Sep 23, 2005
  12. 9
    Available Aired on Sep 23, 2005
  13. 8
    Available Aired on Sep 09, 2005
  14. 7
    Available Aired on Aug 26, 2005
  15. 6
    Available Aired on Aug 19, 2005
  16. 5
    Available Aired on Aug 12, 2005
  17. 4
    Available Aired on Aug 05, 2005
  18. 3
    Available Aired on Jul 29, 2005
  19. 2
    Available Aired on Jul 22, 2005
  20. 1
    Available Aired on Jul 15, 2005
  1. 20
    Not Available Aired on Jan 31, 2005
  2. 19
    Available Aired on Jan 24, 2005
  3. 18
    Available Aired on Jan 17, 2005
  4. 17
    Available Aired on Jan 10, 2005
  5. 16
    Available Aired on Jan 03, 2005
  6. 15
    Available Aired on Dec 06, 2004
  7. 14
    Available Aired on Nov 29, 2004
  8. 13
    Available Aired on Nov 22, 2004
  9. 12
    Available Aired on Nov 15, 2004
  10. 11
    Available Aired on Nov 08, 2004
  11. 10
    Available Aired on Sep 17, 2004
  12. 9
    Available Aired on Sep 10, 2004
  13. 8
    Available Aired on Aug 27, 2004
  14. 7
    Available Aired on Aug 20, 2004
  15. 6
    Available Aired on Aug 13, 2004
  16. 5
    Available Aired on Aug 06, 2004
  17. 4
    Available Aired on Jul 30, 2004
  18. 3
    Available Aired on Jul 23, 2004
  19. 2
    Available Aired on Jul 15, 2004
  20. 1
    Available Aired on Jul 16, 2004

Watch Stargate Atlantis season 5 episode 20 (S05E20)

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"Todd" informs the Atlantis expedition that a rogue group of Wraith has acquired several Zero Point Modules to power a Super-hive, and wants it destroyed. However, after the Daedalus is disabled, they learn that the ship is heading straight for Earth, and they must stop it before it gets there.

Watch Stargate Atlantis season 5 episode 19 (S05E19)

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In the city of Las Vegas in an alternate reality, police Detective John Sheppard investigates a series of bizarre murders where each body appears to have desiccated. He is soon called to Area 51, where Dr. Rodney McKay explains the situation.

Watch Stargate Atlantis season 5 episode 18 (S05E18)

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Dr. Jennifer Keller's body is inadvertently taken over by a cunning thief, Neeva Casol. While Neeva tries to escape Atlantis, Keller finds herself imprisoned with a death sentence on another planet, forcing the team into a race against time to return Keller to her original body before she is put to death.

Watch Stargate Atlantis season 5 episode 17 (S05E17)

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After a Wraith Hive Ship shows up over Atlantis transmitting a distress call, Lt. Colonel John Sheppard's team discovers that its crew has been stricken with a disease they helped create.

Watch Stargate Atlantis season 5 episode 16 (S05E16)

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Dr. Rodney McKay reluctantly returns to Earth to witness the triumph of his rival Dr. Malcolm Tunney, but must help shut down a deadly weather device when the new technology goes horribly awry.

Watch Stargate Atlantis season 5 episode 15 (S05E15)

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While being evaluated by the International Oversight Advisory, Richard Woolsey meets a beautiful scientist new to Atlantis, who is not what she appears. Meanwhile, Lt. Colonel John Sheppard is captured and tortured by an enemy he thought he'd killed several years ago: his sworn enemy, Genii Commander Acastus Kolya.

Watch Stargate Atlantis season 5 episode 14 (S05E14)

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Michael Kenmore has infiltrated Atlantis with an army of his Hybrids, and closes off Stargate Operations and the surrounded levels to prevent anyone from taking it back. His plan; take Teyla Emmagan and her child to perfect his Hybrids, and to destroy the base when they're done. Meanwhile, Lt. Colonel John Sheppard, Dr. Rodney McKay and a team try to take back the city before Michael leaves with what he wants.

Watch Stargate Atlantis season 5 episode 13 (S05E13)

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Lt. Colonel John Sheppard's team is invited by the Coalition of Planets in order to form an alliance. However, the team is misled and is faced to stand trial, for their alleged crimes against the Pegasus galaxy. Their best chance of freedom, is the experiences of Richard Woolsey.

Watch Stargate Atlantis season 5 episode 12 (S05E12)

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Dr. Carson Beckett, now a traveling doctor in Pegasus comes across a planet, where some of the villagers are refugees from Balar, a planet infected with the Hoffan drug, and destroyed by the Wraith. However, the Wraith arrive on the planet and gives the village an ultimatum, hand over the Balarians, or face destruction of the entire civilization.

Watch Stargate Atlantis season 5 episode 11 (S05E11)

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As Dr. Rodney McKay and Dr. Daniel Jackson is held prisoner by the Vanir, they make a startling discovery about who they really are. Meanwhile, "Todd" and his Wraith hijack the Daedalus to find and destroy those who activated the Attero device. The Travelers arrive and Lt. Colonel John Sheppard must help them get to the planet before "Todd" uncovers a way to discover the device for good, even if it means sacrificing McKay and Jackson's lives to do so.

Watch Stargate Atlantis season 5 episode 10 (S05E10)

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Dr. Daniel Jackson arrives in Atlantis to investigate a hidden lab left behind by the rogue Ancient scientist Janus. Their discovery has attracted the attention of a mysterious group of aliens, who infiltrate the city. Meanwhile, "Todd" and a delegation arrive on the Daedalus to bring forward Dr. Jennifer Keller's gene therapy.

Watch Stargate Atlantis season 5 episode 9 (S05E09)

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Dr. Jennifer Keller is kidnapped by a runner named Kiryk. While Dr. Rodney McKay and Ronon Dex tracks them, Kiryk takes Keller to a seriously injured young girl. She must do it fast, since the Wraith have found him, and are hunting them down.

Watch Stargate Atlantis season 5 episode 8 (S05E08)

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The Atlantis expedition has a plan to remove the Wraith's dependence on feeding to use an experimental gene therapy from Michael's database. However, in order to convince the Primary, the Wraith leader, Teyla Emmagan must pose as a Hive Queen.

Watch Stargate Atlantis season 5 episode 7 (S05E07)

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Dr. Carson Beckett is called in to help a team investigating a lab that once belonged to Michael Kenmore. But soon, they realize that a group of experiments that even Michael couldn't control are hellbent on killing the team.

Watch Stargate Atlantis season 5 episode 6 (S05E06)

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Dr. Rodney McKay is infected with the Pegasus equivalent of Alzheimer's disease, known as Second Childhood, a common illness among the elderly in the galaxy. The only way to save him is a shrine on Talus. The downside is that it has turned into a Wraith outpost.

Watch Stargate Atlantis season 5 episode 5 (S05E05)

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While on a mission, Lt. Colonel John Sheppard's team inadvertently brings a mysterious entity to Atlantis. They soon learn that the entity is nothing more than Dr. Elizabeth Weir, who was thought to have been killed after her capture by the Asurans.

Watch Stargate Atlantis season 5 episode 4 (S05E04)

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The Atlantis expedition mysteriously finds the Daedalus, abandoned and drifting in space. When Lt. Colonel John Sheppard's team come to investigate, the ship mysteriously disappears. They soon discover that the ship is actually an alternate Daedalus from a Alternate reality, and the team must find a way back to their Universe or risk being stranded forever in an unfamiliar reality.

Watch Stargate Atlantis season 5 episode 3 (S05E03)

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Ronon Dex is captured by Tyre, who wants to hand him to the Wraith in order to maintain his role in their circle. However, when the deal turns sour, and Tyre is left for dead, the Atlantis expedition persuade him to take back their friend. Meanwhile, The Wraith turn Ronon into a Wraith worshipper.

Watch Stargate Atlantis season 5 episode 2 (S05E02)

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When a mysterious alien organism takes Dr. Jennifer Keller as its host, the newly revived Dr. Carson Beckett and the crew desperately search for a serum to save her from the evolving intruder before it can infiltrate Atlantis. In the meantime, Richard Woolsey officially joins the team, having been chosen as Colonel Samantha Carter's replacement to lead the Atlantis expedition.

Watch Stargate Atlantis season 5 episode 1 (S05E01)

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Lt. Colonel John Sheppard and his team are trapped under the rubble of Michael's facility in order to rescue Teyla Emmagan. As Colonel Samantha Carter launches a team to rescue the rescuers, little do they know that Michael Kenmore is also searching the planet for the survivors.

Watch Stargate Atlantis season 4 episode 20 (S04E20)

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Sheppard returns to Atlantis after a mission and finds the city abandoned, all systems dead -- and instead of ocean, sand dunes as far as the eye can see.

Watch Stargate Atlantis season 4 episode 19 (S04E19)

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The team is shocked when an old friend, believed to be dead, miraculously returns to them. Teyla plans an escape from Michael's captivity.

Watch Stargate Atlantis season 4 episode 18 (S04E18)

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As a mysterious new illness sweeps through the Pegasus Galaxy, Teyla is convinced by a vision that the father of her child is trying to communicate with her.

Watch Stargate Atlantis season 4 episode 17 (S04E17)

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Teal'c visits Atlantis to counsel a headstrong Ronon, who is up for review by the I.O.A. But the two must work together when the Wraith invade the Midway space station in order to reach Earth.

Watch Stargate Atlantis season 4 episode 16 (S04E16)

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McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape.

Watch Stargate Atlantis season 4 episode 15 (S04E15)

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While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator -- who is now on the loose.

Watch Stargate Atlantis season 4 episode 14 (S04E14)

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Colonel Sheppard and Dr. McKay must protect a child princess on a pilgrimage before she can become queen, and learn that she has dangerous enemies threatening her life.

Watch Stargate Atlantis season 4 episode 13 (S04E13)

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An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue.

Watch Stargate Atlantis season 4 episode 12 (S04E12)

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The team finds their former Wraith ally's hive ship drifting in space, which leads them to a secret project that could turn the tide of a civil war.

Watch Stargate Atlantis season 4 episode 11 (S04E11)

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With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships.

Watch Stargate Atlantis season 4 episode 10 (S04E10)

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A mysterious drone crashes into Atlantis, indicating that the Replicators may have found the city. But when Elizabeth Weir appears, the team realizes that the probe is just a part of a bigger mystery.

Watch Stargate Atlantis season 4 episode 9 (S04E09)

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Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation.

Watch Stargate Atlantis season 4 episode 8 (S04E08)

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The team meets a man with extraordinary prophetic abilities, who gives them a dark prediction about Atlantis's future. The Wraith seek a new alliance with Atlantis in their war with the Replicators.

Watch Stargate Atlantis season 4 episode 7 (S04E07)

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During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors.

Watch Stargate Atlantis season 4 episode 6 (S04E06)

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When a virus causes amnesia in everyone except Teyla and Ronon, the Atlantis team must work together to find a cure before their memories fade entirely.

Watch Stargate Atlantis season 4 episode 5 (S04E05)

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Colonel Sheppard is captured by the inhabitants of a generational ship and their beautiful leader, who wish to use his ability to use Ancient technology for their own ends.

Watch Stargate Atlantis season 4 episode 4 (S04E04)

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During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares.

Watch Stargate Atlantis season 4 episode 3 (S04E03)

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When a group of Ronon's people enlist the team's help in raiding a Wraith weapons facility, Ronon reconsiders whether his future lies in Atlantis or with his friends.

Watch Stargate Atlantis season 4 episode 2 (S04E02)

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Colonel Sheppard and his team embark on a risky mission to steal a Z.P.M. power module from the Replicators -- but must rely on a compromised Dr. Weir to succeed.

Watch Stargate Atlantis season 4 episode 1 (S04E01)

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Floating in deep space with the city's protective shield failing, the team must do all they can to keep Atlantis alive. A radical injury threatens Dr. Weir's life.

Watch Stargate Atlantis season 3 episode 20 (S03E20)

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An unstoppable energy weapon leaves Atlantis under seige after Earth launches a preemptive attack against a very powerful enemy's homeworld.

Watch Stargate Atlantis season 3 episode 19 (S03E19)

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The Atlantis team investigates the disappearance of one of their allies, only to find an old enemy engineering a race of powerful monsters.

Watch Stargate Atlantis season 3 episode 18 (S03E18)

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The team discovers an Ancient drilling station deep beneath the surface of the ocean, only to find that a Wraith queen is still alive there.

Watch Stargate Atlantis season 3 episode 17 (S03E17)

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The team tries to relax during a mandatory day off, until an explosion leaves three people dead -- and reveals that one scientist is a walking time bomb.

Watch Stargate Atlantis season 3 episode 16 (S03E16)

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The team discovers the last of a civilization in suspended animation, whose survival is at risk when their station is critically damaged.

Watch Stargate Atlantis season 3 episode 15 (S03E15)

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Sheppard and McKay discover that their competitive video game has been controlling a planet of real people, who now stand on the brink of war.

Watch Stargate Atlantis season 3 episode 14 (S03E14)

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After an Ancient device gives Rodney superhuman powers, his enhanced brilliance is checked only by his impending death -- unless he can learn how to ascend.

Watch Stargate Atlantis season 3 episode 13 (S03E13)

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The team finds Lucius Lavin manipulating the people of another hapless planet, using Ancient technology to pose as an invincible hero.

Watch Stargate Atlantis season 3 episode 12 (S03E12)

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The inhabitants of Atlantis begin to suffer ill effects when the planet's whale population begins migrating to the island city, bringing an unexpected harbinger of doom.

Watch Stargate Atlantis season 3 episode 11 (S03E11)

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The Atlantis team goes against orders to try and save Atlantis from Replicator control -- and to rescue General O'Neill and Richard Woolsey, who are trapped in the occupied city.

Watch Stargate Atlantis season 3 episode 10 (S03E10)

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The Atlantis expedition is stunned to learn that a ship full of Ancients is returning to reclaim their lost city.

Watch Stargate Atlantis season 3 episode 9 (S03E09)

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Sheppard and Ronon are influenced by a mind-altering device created by the Wraith while on a mission to rescue a lost team.

Watch Stargate Atlantis season 3 episode 8 (S03E08)

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Rodney McKay is reunited with his estranged sister back on Earth, who has given up a brilliant career as a scientist to raise a family.

Watch Stargate Atlantis season 3 episode 7 (S03E07)

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Colonel Sheppard finds himself the prisoner of a Genii commander, along with a desperately hungry Wraith who has been separated from his hive.

Watch Stargate Atlantis season 3 episode 6 (S03E06)

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Elizabeth Weir wakes up in a mental institution, where she is told that the expedition to Atlantis and the Stargate are figments of her imagination.

Watch Stargate Atlantis season 3 episode 5 (S03E05)

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Weir and the team visit an advanced civilization that split off from the Lanteans thousands of years ago, but discover that they may not have left Atlantis in peace.

Watch Stargate Atlantis season 3 episode 4 (S03E04)

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Ronon Dex is captured by the Wraith and returned to his homeworld, where he is haunted by his past as he is forced to once again become their prey.

Watch Stargate Atlantis season 3 episode 3 (S03E03)

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Sheppard's team meets an obnoxious man who is adored by all thanks to a secret that he carries -- and who has an unexpected affect on them.

Watch Stargate Atlantis season 3 episode 2 (S03E02)

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The Atlantis team must decide the fate of a colony of Wraith they have turned into humans. Dr. Weir must defend her leadership when she is evaluated by the I.O.A.

Watch Stargate Atlantis season 3 episode 1 (S03E01)

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The team desperately attempts to stop two Wraith hive ships from reaching Earth. Sheppard must rely on an old foe to rescue McKay and Ronon.

Watch Stargate Atlantis season 2 episode 20 (S02E20)

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Michael and his Wraith faction arrive at Atlantis to propose an alliance, hoping to use the retrovirus to transform their Wraith enemies into prey.

Watch Stargate Atlantis season 2 episode 19 (S02E19)

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Sheppard's team meets a civilization about to be destroyed by a super-volcano, and is trapped there when the Stargate is destroyed during the evacuation.

Watch Stargate Atlantis season 2 episode 18 (S02E18)

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An amnesiac young Lieutenant in Atlantis suffers from disturbing nightmares that he is a Wraith, only to make a shocking discovery about himself.

Watch Stargate Atlantis season 2 episode 17 (S02E17)

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After a team from Atlantis goes missing, the expedition finds itself in the middle of a Genii coup.

Watch Stargate Atlantis season 2 episode 16 (S02E16)

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The team discovers two pods that contain the minds of alien beings, who take control of Weir and Sheppard's bodies to continue their personal war.

Watch Stargate Atlantis season 2 episode 15 (S02E15)

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The team finds a world that possesses Ancient defense technology, where Colonel Sheppard finds himself a pawn in the rivalry between the heirs to the throne.

Watch Stargate Atlantis season 2 episode 14 (S02E14)

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When Dr. McKay is trapped underwater in a sinking Puddle Jumper, his only chance for survival may be an hallucination of Samantha Carter.

Watch Stargate Atlantis season 2 episode 13 (S02E13)

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When an operative of the Trust plants a bomb in Atlantis, the team must find a spy within their own ranks before the Wraith arrive and discover the city.

Watch Stargate Atlantis season 2 episode 12 (S02E12)

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Sheppard finds himself on a planet where time passes more rapidly, with no way to contact his team or return to Atlantis.

Watch Stargate Atlantis season 2 episode 11 (S02E11)

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Colonel Sheppard and his team find themselves prisoners of the Wraith following Ford's attack on a hive ship. Dr. McKay goes to great lengths to help them.

Watch Stargate Atlantis season 2 episode 10 (S02E10)

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The team is captured by the missing Lieutenant Ford, who is now leading a group of young men who are taking the Wraith enzyme -- and who wants the team's help in a suicide attack against a hive ship.

Watch Stargate Atlantis season 2 episode 9 (S02E09)

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When the team finds an Ancient warship adrift on the edge of the galaxy, its crew still alive, Colonel Sheppard enters their virtual reality stasis to communicate with them.

Watch Stargate Atlantis season 2 episode 8 (S02E08)

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Colonel Sheppard begins to undergo a disturbing physical transformation after being exposed to Beckett's anti-Wraith drug.

Watch Stargate Atlantis season 2 episode 7 (S02E07)

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The team discovers a young Wraith girl who has been raised by a human, and is in hiding from the people of her human village in fear of her life.

Watch Stargate Atlantis season 2 episode 6 (S02E06)

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McKay puts the team at risk when he tries to perfect unfinished Ancient technology that wiped out a civilization. Ronon Dex discovers that he is not the lone survivor from his world.

Watch Stargate Atlantis season 2 episode 5 (S02E05)

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The Atlantis team finds a culture that lives in relative safety from the Wraith, because they hand over their criminals to the Wraith -- and crash-land in the volatile penal colony.

Watch Stargate Atlantis season 2 episode 4 (S02E04)

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A run-in with a Wraith Dart leaves the consciousness of a precocious Atlantis security officer trapped in Dr. McKay's mind.

Watch Stargate Atlantis season 2 episode 3 (S02E03)

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Sheppard and his team attempt to locate Lieutenant Ford, only to find themselves captives of a former soldier who is being hunted by the Wraith.

Watch Stargate Atlantis season 2 episode 2 (S02E02)

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The Daedalus is infected by a Wraith computer virus, while members of the expedition hope to return to Earth.

Watch Stargate Atlantis season 2 episode 1 (S02E01)

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The Daedalus arrives to defend Atlantis from the Wraith onslaught, but it may not be enough when the team discovers that an even larger armada is on the way.

Watch Stargate Atlantis season 1 episode 20 (S01E20)

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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.

Watch Stargate Atlantis season 1 episode 19 (S01E19)

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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.

Watch Stargate Atlantis season 1 episode 18 (S01E18)

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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.

Watch Stargate Atlantis season 1 episode 17 (S01E17)

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With a brief opportunity to send a data transmission to Earth, members of the Atlantis expedition compose video messages home to their loved ones.

Watch Stargate Atlantis season 1 episode 16 (S01E16)

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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.

Watch Stargate Atlantis season 1 episode 15 (S01E15)

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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.

Watch Stargate Atlantis season 1 episode 14 (S01E14)

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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.

Watch Stargate Atlantis season 1 episode 13 (S01E13)

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Nearly a third of Atlantis's residents are infected with a deadly virus that causes hallucinations and death, forcing a lockdown of the city.

Watch Stargate Atlantis season 1 episode 12 (S01E12)

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Sheppard's team investigates a downed Wraith ship, and find themselves stuck on a planet with a lone Wraith survivor.

Watch Stargate Atlantis season 1 episode 11 (S01E11)

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Major Sheppard plays a dangerous game of cat and mouse with soldiers who have seized control of Atlantis and taken Weir and McKay hostage.

Watch Stargate Atlantis season 1 episode 10 (S01E10)

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When a massive storm threatens the city, Atlantis is evacuated -- only to be taken over by the team's newest enemy.

Watch Stargate Atlantis season 1 episode 9 (S01E09)

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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.

Watch Stargate Atlantis season 1 episode 8 (S01E08)

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Efforts to open trade relations with a species called the Genii turn sour when the team discovers their new "allies" have ulterior motives.

Watch Stargate Atlantis season 1 episode 7 (S01E07)

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The team finds a world whose people are on the brink of a discovery that may make them immune to the Wraith feeding.

Watch Stargate Atlantis season 1 episode 6 (S01E06)

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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.

Watch Stargate Atlantis season 1 episode 5 (S01E05)

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After a series of run-ins with the Wraith, the team begins to suspect their Athosian allies of having a spy in their midst.

Watch Stargate Atlantis season 1 episode 4 (S01E04)

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The team finds themselves in mortal danger when their Puddle Jumper ship becomes lodged in the Stargate.

Watch Stargate Atlantis season 1 episode 3 (S01E03)

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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.

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Sheppard tries to convince Weir to mount a rescue mission to free Colonel Sumner, Teyla, and the others captured by the Wraith.

Watch Stargate Atlantis season 1 episode 1 (S01E01)

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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.

Watch Stargate Atlantis (2004) show trailer

How to watch Stargate Atlantis online without downloading

  1. Watch Stargate Atlantis online only at TVZion for free. No download or registration required.
  2. Stargate Atlantis first started airing on Jul 15, 2004 and we have updated 99 out of 100 aired episodes and we will add more as they air.
  3. Please note that new Stargate Atlantis episodes can take upto 2 days to be updated after their first airing date.
  4. To watch Stargate Atlantis episodes, select the season and episodes from the list above and the proper episode information will appear on the right side (or below in case of mobile devices), click on the watch now button below the episode info to go to episode page, and watch the respective episode without downloading.

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