With the Wraith overrunning the city, Weir is forced into a hostage situation with the Genii to trade for prototype nuclear weapons. Back at Atlantis, Rodney McKay and Radek Zelenka work through exhaustion to complete the unfinished Genii bombs. The episode concludes on a gut-wrenching cliffhanger:
The tide seemingly turns when Colonel Dillon Everett arrives with a company of Marines and heavy artillery originally intended for Earth's battlecruisers. This military reinforcement brings hope in the form of: [S1E20] The Siege: Part 2
Everett is cornered and fed upon by a Wraith, while Lt. Aiden Ford is caught in an explosion that hurls him into the sea. With the Wraith overrunning the city, Weir is
A new Deep Space Carrier carrying a recovered Zero Point Module (ZPM) that could finally power the city's shields. This military reinforcement brings hope in the form
When the Naquadah generator fails, Sheppard takes a Puddle Jumper on a manual kamikaze run to detonate a nuke inside a Hive ship.
The "cavalry" isn't without its costs. Colonel Everett immediately clashes with Dr. Elizabeth Weir and John Sheppard, holding a personal grudge against Sheppard for the death of Colonel Marshall Sumner.