Ep 20. Siege: Part 2

In Stargate Atlantis season 1 episode 20, titled "Siege: Part 2," the Atlantis team must continue their efforts to defend against the Wraith attack on Atlantis. With the enemy already breaching into the city's control room and the shield generators failing, they are forced to evacuate the remaining team members to safety on the mainland. However, as they try to escape, they discover a new challenge: the Wraith have already taken over the Stargate Room, blocking their only avenue for escape.

With their backs against the wall, the team realizes that they have to take a stand and defend their city. They begin to fortify their positions, creating barricades and setting traps for the invading Wraith. Meanwhile, Major Sheppard is determined to address the issue of the Stargate Room head-on and with Colonel Sumner gone, Sheppard is now the leader of their team.

Despite the odds stacked against them, Sheppard's team defies the Wraith's expectations and holds them off. They begin to formulate a plan to take back the Stargate Room and regain control of the Stargate. But the Wraith have their own plan, and it involves using a large, powerful drilling device that threatens to make Atlantis their own.

As the stakes continue to rise and it becomes clear that the Wraith army will not stop until they have taken over the city and its technology, Atlantis' team must decide what risks they are willing to take to protect their home. With explosive action and intense drama, the second part of "Siege" leaves viewers wondering who will come out on top and what the future holds for the beleaguered Atlantis team.