Harmony: Wanting to maintain diplomatic relations, Sheppard and McKay agree to accompany a precocious young princess on a rite of passage. But unexpected enemies prove a threat. (S4, ep 14) [S]
Outcast: When Lt Colonel John Sheppard receives word that his father has died, he returns to Earth. But once there, he becomes embroiled in a covert experiment gone awry. (S4, ep 15) [S]
Trio: During an off-world mission, Carter, McKay and Dr Keller become trapped in an underground mining chamber, rocked by fierce seismic tremors. How will they escape? (S4, ep 16) [S]
Midway: When Ronon comes under review by the IOA, Carter asks Teal'c to mentor him, but the appraisal is put on hold when the Wraith target the Midway station. (S4, ep 17) [S]
The Kindred (Part 1): Dr Keller discovers that a Wraith-killing protein is infecting thousands of humans, and Teyla convinces Sheppard to join the search for her people. (S4, ep 18) [S]
Quarantine: When an alarm sounds throughout the city, initiating a quarantine lock down, the Atlantis team find themselves trapped in various sections of the city. (S4, ep 13) [S]
Spoils Of War: The team successfully salvage a partially damaged Hive ship and in the process retrieve some critical information that may help in their war against the Wraith. (S4, ep 12) [S]
Be All My Sins Remember'd: The Atlantis team strives to eliminate the Replicators once and for all, but with time in short supply they may well have a crisis on their hands. (S4, ep 11) [S]
This Mortal Coil: The Atlantis team's worst fears are realised when a mysterious probe crashes into the city, and the crew are convinced the Replicators have found them. (S4, ep 10) [S]
Miller's Crossing: McKay and his sister are kidnapped on Earth by a man in need of their expertise. The rest of the team must enlist the help of an NID agent to rescue them. (S4, ep 9) [S]
The Seer: An Oracle visits Atlantis, warning the team that Wraith hive ships are heading in their direction. He also exposes a deep secret Teyla has yet to reveal. (S4, ep 8) [S]
Missing: Teyla and Dr Keller visit New Athos in search of Teyla's people, who have gone missing from their planet. Trouble strikes when primitive warriors hunt the pair down. (S4, ep 7) [S]
Tabula Rasa: A deadly infection threatens the Atlantis expedition when the team contracts a virus that causes memory loss. Ronan and Teyla must find a cure. (S4, ep 6) [S]
Travelers: An unfamiliar race, known as the Travelers, hunts down the Atlantis expedition after hearing of the team's notorious ancient techniques used to fight the Wraith. (S4, ep 5) [S]
Doppelganger: Stargate delves into the past when Sheppard comes across a crystalline species similar to one that Jack O'Neill encountered 10 years ago. (S4, ep 4) [S]
Reunion: Ronon is reunited with a group of his fellow Satedans and is forced to decide where his allegiance lies, with the people from his old civilisation or with Atlantis. (S4, ep 3) [S]
Lifeline: It's a race against time to find the missing city of Atlantis as the team embarks on a daring infiltration to steal a ZPM from the Replicators. (S4, ep 2) [S]
Adrift: The Stargate crew are where we left them, suspended in space with only 24 hours of life support remaining. How will they survive? (S4, ep 1) [S]
First Strike: A failed attack on a Replicator armada forces McKay to follow in the footsteps of the Ancients and take a drastic step to save Atlantis from destruction. (S3, ep 20) [S]
Vengeance: While investigating a village that had previously gone missing, Sheppard and his team stumble onto a Wraith experiment built to create large, deadly insects. (S3, ep 19) [S]
Submersion: While searching for a geothermal drilling station on the ocean floor, the team unknowingly awakens a Wraith queen who has lain dormant for thousands of years. (S3, ep 18) [S]
Sunday: The Atlantis team unwinds during a city wide holiday, but their rest and relaxation is cut short when a deadly explosion rips through the city. (S3, ep 17) [S]
The Ark: After discovering an antiquated space station, Sheppard and his team mistakenly awaken a race of people who have been frozen in stasis for thousands of years. (S3, ep 16) [S]
First Contact: Atlantis encounters a mysterious alien race when Dr McKay and Dr Jackson come across a secret lab. Do the visitors have good intentions? (S5, ep 10) [S]
The Last Man: Season four comes to a shattering climax when, having failed to locate Teyla, Sheppard returns to Atlantis to find the city abandoned and all systems dead. (S4, ep 20) [S]
Be All My Sins Remember'd: The Atlantis team strives to eliminate the Replicators once and for all, but with time in short supply they may well have a crisis on their hands. (S4, ep 11) [S]
Lifeline: It's a race against time to find the missing city of Atlantis as the team embarks on a daring infiltration to steal a ZPM from the Replicators. (S4, ep 2) [S]
First Strike: A failed attack on a Replicator armada forces McKay to follow in the footsteps of the Ancients and take a drastic step to save Atlantis from destruction. (S3, ep 20) [S]
The Return (Part 2): The team goes against orders to launch a rescue attempt to free General Jack O'Neill, so that they can try to save Atlantis from Replicator control. (S3, ep 11) [S]
The Siege (Part 3 of 3): The Atlantis team are back, facing the impending destruction of the lost city. There's no respite as the Wraith plan a fresh assault... (S2, ep 1) [S]
The Siege Part 1: The season finale opens with Wraith ships on a mission to kill the team and take the lost city. Is reprogramming Atlantis to self-destruct the only solution? (S1, ep 19) [S]
Rising (Part 1 of 2): The first episode in this spin-off series from Stargate SG-1. Dr Elizabeth Weir steps through the gate to the Pegasus Galaxy and discovers Atlantis. (S1, ep 1) [S]
The Game: Upon realising that a simulation game they have been playing is real, McKay and Sheppard are forced to put their petty squabbles aside. (S3, ep 15) [S]
Tao Of Rodney: Zapped by a mysterious device left running by the Ancients, Rodney McKay (David Hewlett) begins to evolve into a super human. (S3, ep 14) [S]
Irresponsible: When the team finds Lucius up to his old tricks again they try to blow the whistle on his scamming ways, but are drawn into a fight with Kolya and his men. (S3, ep 13) [S]
Echoes: When the people of Atlantis begin to have ghostly visions, Teyla believes the apparitions they are seeing are actually Ancients, warning them of a great danger. (S3, ep 12) [S]
The Return (Part 2): The team goes against orders to launch a rescue attempt to free General Jack O'Neill, so that they can try to save Atlantis from Replicator control. (S3, ep 11) [S]
The Return (Part 1): The Atlantis expedition is stunned to learn that a ship of Ancients is returning to reclaim their lost city. Guest starring Richard Dean Anderson. (S3, ep 10) [S]
Phantoms: While on a mission to rescue a lost team, Sheppard and Ronon are placed in serious danger when they are influenced by a mind-altering device created by the Wraith. (S3, ep 9) [S]
Common Ground: Colonel Sheppard finds himself the prisoner of a renegade Genii warrior, along with a Wraith who has been separated from his hive. (S3, ep 7) [S]
The Real World: 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. (S3, ep 6) [S]
Progeny: Weir and the team visit an advanced civilisation that split off from the Lanteans thousands of years ago, but discover that they may not have left Atlantis in peace. (S3, ep 5) [S]
Sateda: 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. (S3, ep 4) [S]
Misbegotten: A dangerous situation develops when the Atlantis team set up a prisoner of war camp for former Wraiths. Meanwhile, the IOA continues its investigation into Dr Weir. (S3, ep 2) [S]
No Man's Land: The action-packed sci-fi drama returns for its third series, as the Atlantis' crew desperately tries to stop two Wraith hive ships from reaching Earth. (S3, ep 1) [S]
Allies (Part 1 of 2): In the season finale, the Wraith that Atlantis tried to turn human reappears, and he wants to strike a deal. But is this partnership too good to be true? (S2, ep 20) [S]
Grace Under Pressure: McKay gets trapped underwater in a sinking Puddle Jumper and must rely on Samantha Carter for his survival. Will he survive? (S2, ep 14) [S]
Epiphany: Sheppard is pulled through a mysterious portal and trapped in a world inhabited by ancestors of the Ancients, where a violent beast is on the rampage. (S2, ep 12) [S]
The Hive: The enzyme's grip on the team begins to lessen, sending them into withdrawal as they try to escape from the Wraith hive ship. (S2, ep 11) [S]