The team obtains a Wraith Hive ship after the battle with the Replicators and learn something new about their enemy.
Season 4 Episode 12 of Stargate Atlantis resulted in a 0.00 rating in the 18-49 demographic.
s04e01 - Adrift (2)
s04e02 - Lifeline (3)
s04e03 - Reunion
s04e04 - Doppelganger
s04e05 - Travelers
s04e06 - Tabula Rasa
s04e07 - Missing
s04e08 - The Seer
s04e09 - Miller's Crossing
s04e10 - This Mortal Coil (1)
s04e11 - Be All My Sins Remember'd (2)
s04e12 - Spoils of War (3)
s04e13 - Quarantine
s04e14 - Harmony
s04e15 - Outcast
s04e16 - Trio
s04e17 - Midway
s04e18 - The Kindred (1)
s04e19 - The Kindred (2)
s04e20 - The Last Man (1)
A secret group of scientists have discovered the location of the famous lost city of Atlantis, but it's not on Earth. It's located in another galaxy altogether, the Pegasus galaxy. Stargate Atlantis, a spin-off from the highly successful Stargate SG-1 series, follows a multinational scientific and military group, lead by Diplomat Dr. Elizabeth Weir, headed on a one way trip to Atlantis. Their mission: to investigate the secrets of Atlantis, a city now known to have been built by ancient powerful beings, and bring whatever they discover back to Earth. They will be all on their own, with no means to return, with no means of rescue or support, unless they can find the technology they need in Atlantis to return them to Earth.
Once in Atlantis, the group finds the city abandoned; asleep for tens of thousands of years, and no power source left for a return home. They must find a power source within Atlantis' own Pegasus galaxy using the same stargate system that got them there or they will be stranded forever. On the first planet they visit, they accidentally waken a new, powerful, and more evil enemy than human kind has ever faced, the Wraith. And the Wraith are hungry - for humans!