Stargate Atlantis S05E20 Enemy at the Gate PreAir

Stargate Atlantis (often abbreviated as SGA) is an American-Canadian science fiction television program, part of the Stargate franchise owned by MGM. Developed by producers Brad Wright and Robert C. Cooper, it is a spin-off from the television series Stargate SG-1. It is filmed and produced in Canada. Stargate Atlantis follows the adventures of a human expedition to the lost city of Atlantis in the Pegasus Galaxy. The Stargate has brought humanity into contact with other cultures, including new and powerful enemies: the Wraith, the Genii, and later the Asurans and a lost tribe of Asgard, all while trying to uncover the secrets the Ancients left behind.