Allies: 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]
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]
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]
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]
Infection: Sheppard and crew stumble upon a seemingly abandoned Wraith vessel. Ignoring the old adage that appearances can be deceiving, they decide to investigate. (S5, ep 17) [S]
Brain Storm: Rodney's 'friend' Malcolm Tunney unveils a device that promises to extinguish the threat of global warming. His demonstration certainly stirs up a storm. (S5, ep 16) [S]
Remnants: Sheppard is abducted and held captive by an old enemy whom he believed to be dead. Meanwhile, Atlantis discovers the existence of an ancient alien race. (S5, ep15) [S]
The Prodigal: Michael and a few genetically-modified friends infiltrate Atlantis and hold Teyla hostage. Can the team get to her before it's too late? (S5, ep14) [S]
Inquisition: The Atlantis crew are on troubled ground when a newly formed coalition of human worlds puts them on trial for alleged crimes against the Pegasus galaxy. (S5, ep 13) [S]
Outsiders: The survivors of both a plague concocted by Michael and a deadly Wraith attack face a new danger from the people who originally gave them shelter. (S5, ep 12) [S]
The Lost Tribe: A pressure-cooker instalment of the sci-fi favourite: Sheppard must find Rodney McKay and Dr Daniel Jackson before Todd does. (S5, ep 11) [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]
Tracker: The team comes to the aid of a village under Wraith attack. In a twist in the tale, one of their own is kidnapped. Can Ronon rescue his comrade in time? (S5, ep 9) [S]
The Queen: When Dr Keller maintains that she can extinguish the Wraith appetite for humans for good, Teyla embarks on a dangerous mission disguised as a Wraith queen. (S5, ep 8) [S]
Whispers: Sheppard and Beckett join Teldy and co when they find another of Michael's labs. Whilst exploring a nearby town smothered in fog, they discover they're not alone. (S5, ep 7) [S]
The Ghost In The Machine: When every single system in the Atlantis is hit by power disruptions, the crew must determine what is causing the problems before it's too late. (S5, ep 5) [S]
The Daedalus Variations: The crew investigates a duplicate Daedalus in orbit. Once aboard, the team are thrown into an alternate reality. Will they find a way back? (S5, ep 4) [S]
Broken Ties: Ronon is ambushed by treacherous Tyre during an off-world mission and handed over to the Wraith. In a race against time, can the Stargate team come to his rescue? (S5 ep 3) [S]
The Seed: Dr Jennifer Keller falls foul of a mysterious alien virus. Desperate to find an antidote, the team release Dr Carson from the stasis chamber. (S5, ep 2) [S]