Season 5
As Atlantis faces its greatest threats yet, the team must rely on unexpected alliances and new technologies to safeguard their city and the galaxy. The season builds toward a climactic confrontation that tests the strength, ingenuity, and resolve of the entire expedition.
Episodes
1 Search and Rescue (2) Jul 10, 2008 
2 The Seed Jul 17, 2008 
3 Broken Ties Jul 24, 2008 
4 The Daedalus Variations Jul 31, 2008 
5 Ghost in the Machine Aug 14, 2008 
6 The Shrine Aug 21, 2008 
7 Whispers Sep 4, 2008 
8 The Queen Sep 11, 2008 
9 Tracker Sep 18, 2008 
10 First Contact (1) Sep 25, 2008 
11 The Lost Tribe (2) Oct 9, 2008 
12 Outsiders Oct 16, 2008 
13 Inquisition Oct 19, 2008 
14 The Prodigal Nov 6, 2008 
15 Remnants Nov 13, 2008 
16 Brain Storm Nov 20, 2008 
17 Infection Dec 4, 2008 
18 Identity Dec 11, 2008 
19 Vegas Dec 18, 2008 
20 Enemy at the Gate Jan 8, 2009