![](https://www.gateworld.net/wp-content/uploads/2017/06/atl_201.jpg)
In “The Siege, Part 3,” the Ancient city of Atlantis stands on the brink of destruction as the Wraith armada rains down its assault. Things look helpless for the team — until reinforcements arrive in the form of the advanced Earth battle cruiser, the Daedalus. Mitch Pileggi (The X-Files) guest stars as Colonel Steven Caldwell.
“The Siege, Part 3” will air on July 15 on The SCI FI Channel in the U.S.!