Season 2
As the Wraith threat intensifies, the team strives to find ways to defend Atlantis and the Pegasus Galaxy from impending invasion. Key episodes focus on breakthroughs in ancient technology, dangerous alliances, and a desperate search for a means to stop their enemies once and for all.
Episodes
1 The Siege (3) Jul 15, 2005 
2 The Intruder Jul 22, 2005 
3 Runner Jul 29, 2005 
4 Duet Aug 5, 2005 
5 Condemned Aug 12, 2005 
6 Trinity Aug 19, 2005 
7 Instinct Aug 26, 2005 
8 Conversion Sep 9, 2005 
9 Aurora Sep 23, 2005 
10 The Lost Boys (1) Sep 23, 2005 
11 The Hive (2) Nov 16, 2005 
12 Epiphany Nov 28, 2005 
13 Critical Mass Dec 5, 2005 
14 Grace Under Pressure Dec 10, 2005 
15 The Tower Dec 19, 2005 
16 The Long Goodbye Jan 2, 2006 
17 Coup D'etat Jan 9, 2006 
18 Michael Jan 16, 2006 
19 Inferno Jan 23, 2006 
20 Allies (1) Jan 30, 2006