Stargate: Atlantis (2004–2009)

This sci-fi series follows an international expedition team that travels through the Stargate to the lost city of Atlantis in the distant Pegasus Galaxy. Blending exploration, military science fiction, and episodic adventure, the show centers on encounters with new civilizations and the threat of the Wraith. Its narrative explores survival, interplanetary diplomacy, and the challenges of maintaining a remote outpost far from Earth.

Från IMDB:
An international team of scientists and military personnel discover a Stargate network in the Pegasus Galaxy and come face-to-face with a new, powerful enemy: The Wraith.