The team finds a world whose people are on the brink of a discovery that may make them immune to the Wraith feeding.

McKay’s efforts to harness the energy of an alien planet’s atmosphere allows for a return trip to Earth — but the team may not be able to return to Atlantis.

Sheppard tries to convince Weir to mount a rescue mission to free Colonel Sumner, Teyla, and the others captured by the Wraith.

The team finds themselves in mortal danger when their Puddle Jumper ship becomes lodged in the Stargate.

After a series of run-ins with the Wraith, the team begins to suspect their Athosian allies of having a spy in their midst.

A new Stargate team embarks on a dangerous mission to a distant galaxy, where they discover a mythical lost city — and a deadly new enemy.