"Stargate Atlantis," a spin-off of "Stargate SG-1," is the second series in the franchise based on the 1994 "Stargate" movie.

When it left the air for good in 2009, Stargate Atlantis was firing on all cylinders — and it still had plenty of ZPM fuel left in the tank. The show’s fifth and final season ended with the episode ...

Within the ruins of the legendary city of Atlantis is buried a secret base left by the Ancients, originators of the Stargate. A new team of explorers travel to the distant galaxy where Atlantis is ...