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]
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]
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]
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]
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]
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]
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]
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]
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]
McKay And Mrs Miller: McKay is reunited with his estranged sister, who gave up a promising career to raise a family. Will she put their differences aside to help the SG-1 team? (S3, ep 8) [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]
Aurora: The crew discovers a decrepit warship whose ancient crew are frozen in stasis pods and live in a virtual world. But it's a world infiltrated by a Wraith in disguise... (S2, ep 9) [S]
Conversion: Dr Beckett realises that the 'retrovirus' Ellia ingested is now in Sheppard's bloodstream... and he's mutating into the very creature that attacked him. (S2, ep 8) [S]
Instinct: Dr Beckett experiments with a 'retrovirus' that could turn Wraiths back into humans, but his formula causes an unexpected and dangerous reaction. Sparky sci-fi. (S2, ep 7) [S]
Condemned: The team visit a technologically advanced planet. And oddly, its inhabitants remain unharmed by the Wraith. Top notch sci-fi. (S2, ep 5) [S]
The Intruder: A mysterious intruder has infected the Daedalus' computers with a virus that may allow it to take control of the ship. Cracking sci-fi action. (S2, ep 2) [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]
The Gift: Plagued by nightmares, Teyla investigates what might be causing them. Alarmingly, she discovers she's a descendant of humans who were experimented on by the Wraith. (S1, ep 18) [S]
Letters From Pegasus: The team is given a wonderful opportunity to send messages to loved ones back on Earth. But will the messages reach home? (S1, ep 17) [S]
Before I Sleep: When a woman is found in suspended animation, the team is shocked to discover it is Dr Weir, who tells them of her trip 10,000 years into Atlantis's past. (S1, ep 15) [S]
Sanctuary: The team finds a paradise that would make an ideal sanctuary for those fleeing the Wraith. But the locals don't believe their goddess will permit it. (S1, ep 14) [S]
The Defiant One: When Sheppard's team investigate a downed Wraith ship, they find themselves stuck on a planet with a lone Wraith survivor. (S1, ep 12) [S]
The Eye: 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, ep 11) [S]
The Storm: When a massive storm threatens the city, Atlantis is evacuated, allowing the team's newest enemy to move in. Contains strobing effects. (S1, ep 10) [S]
Underground: Trade relations with a species called the Genii turn sour when the team discovers their new 'allies' have ulterior motives. Guest starring Colm Meaney. (S1, ep 8) [S]
Childhood's End: Sheppard and the team visit a strange world in which no-one is over 24 years old. Ritual suicide is believed to keep the Wraith at bay. (S1, ep 6) [S]
Suspicion: Relationships are torn apart and tensions run high when Dr Weir suspects the crew's new friends the Athosians are harbouring a spy. (S1, ep 5) [S]
Thirty Eight Minutes: Fleeing an encounter with the Wraith, the ship becomes lodged in the Stargate. And Sheppard is paralyzed by an alien symbiote feeding off his life force. (S1, ep 4) [S]
Hide And Seek: A game causes one of the Athosian children to open a unit and unleash a dark entity. They soon realise that the harmless-looking cloud is anything but... (S1, ep 3) [S]
Rising (Part 2 of 2): Unable to return to Earth, the crew looks for a new fuel source. They happen upon a settlement, but the villagers live in fear. The enemy is coming. (S1, ep 2) [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]
Enemy At The Gate: The sci-fi favourite reaches its 100th episode and prepares to make its final puddle-jump. Will the Wraith threat be eliminated? Last ever episode. (S5, ep 20) [S]
Vegas: It's CSI: Atlantis in this penultimate instalment. Set in an alternate reality, Sheppard is a homicide detective hunting down a serial killer terrorising Las Vegas. (S5, ep 19) [S]
Identity: Dr Keller is taken over by an alien consciousness named Neeva and she's far from pleasant. Barnstorming, body-swapping action. (S5, ep 18) [S]