Owner and CEO of Colson Industries declares in a press conference that there is alien life and that he has proof. SGC fails in its attempts to keep him quiet on the battle over the Antarctic. However, they are greatly surprised when the proof he shows the media are not his satellite images, but a living Asgard.

General Hammond returns to SGC to take Dr. Jackson with him on a trip to Atlantis onboard the Prometheus. In the middle of their trip, the Prometheus picks up a distress signal and Hammond decides to investigate. Things get sticky when a Kull Warrior takes control of the Prometheus, leaving Hammond and his crew, minus Daniel Jackson, behind in a damaged Alkesh.

Vala returns to the SGC upon having been separated from Daniel for a little under an hour. The effects of the bracelets have not diminished even though they have been removed. In order to get the effects reversed, Mitchell, Jackson, and Vala must deal with many people that Vala has used over the years to gain favors.

Sam manages to activate an Ancient device they found at the Glastonbury site and she and Mitchell are shifted into a phase that makes them invisible to everyone. Daniel soon figures out just what is going on but Dr. Lee's proposed solution sends Daniel to the same plane as Sam and Mitchell. There he is able to translate information explaining that Merlin had created a weapon against the Ori - and provides a gate address where it can be found. Meanwhile, Teal'c travels to a Jaffa planet that has sent out a distress call. The two events are related.

Cameron Mitchell must go undercover inside the Lucian Alliance to find the location of the hijacked Odyssey.

SG-1 blows up three transport ships in a row; Netan puts a price on their heads. General Landry grants the team members spare time on Earth. Daniel spends it researching in a library, where he meets a bounty hunter who tries to seduce him, then switches to her handgun... but is taken out by a bus. Sam gives a lecture on Air Force technological progress together with Dr. Bill Lee; a sniper nearly misses, but is taken out with an experimental weapon they'd brought along to demonstrate. Teal'c is injured by surprise at a Jaffa camp and successfully traps the killer to try again. Cam goes to his Kansas high school reunion and Vala succeeds in making him bring her along, pretending to be his accountant and partner. His still sexy former flame he'd believed out of his reach, Amy Vandenberg, is initially scared off by Vala, but, divorced and interested, explains she still has a secret crush on him. Alien bounty hunter Odai Ventrell assumes numerous classmates' appearances to kill him. Vala's failed rescue gets them both captured publicly, so he threatens to kill off reunion guests unless the other SG-1 members take their place, but they trick him using Chimera technology; they hope Netan's failure to eliminate them will rekindle the power struggle and Odai reacts surprisingly.