Point of View

"Point of View" is the sixth episode of the third season, as well as the 50th episode of Stargate SG-1.

Plot
In an alternate universe, Samantha Carter and Maj. Kawalsky are running from a Goa'uld attack inside Stargate Command. Using the quantum mirror from planet P3R-233, they make their way to Area 51, where the quantum mirror of our universe is being held, having been discovered by SG-1. (see "There But For the Grace of God")

The two are captured and sent to SGC where they are interrogated. During a meeting it is learned that in the universe of the alternate SGC (there called SGA), O'Neill and Carter were married until O'Neill was killed defending the SGA. Also Teal'c is still an enemy of Earth as the First Prime of Apophis and has led the attack on the SGA, while Jackson never joined the SGA. The most shocking revelation is, however, that the Goa'uld have invaded Earth, conquered every major city and made slaves of the population.

Alternate Carter and Kawalsky are allowed to remain at the SGC. O'Neill visits the alternate Carter and she tells him about their marriage and how he died. She cries on his shoulder as he awkwardly comforts her. Later, the alternate Carter starts suffering from entropic cascade--the result of two Carters in one universe--which she had predicted but had not expected to start so soon. If the alternate Carter and Kawalsky stay, she'll eventually die, but if they return to their reality the Goa'uld will kill them.

To prevent this a mission is planned in which O'Neill, the alternate Carter and Kawalsky, Jackson, and Teal'c (in Jaffa armor) will go back to the alternate universe and contact the Asgard to free Earth. While the two Carters work on a power generator which will help them contact the Asgard, Kawalsky explains to Jackson how the quantum mirror works.

After the team goes through the mirror, they are able to capture the alternate Teal'c, who is then killed by the Teal'c of our reality. Teal'c then takes his place while the others activate the power generator and successfully dial the Stargate to get Dr. Carter to the Asgard homeworld. Apophis discovers Teal'c's betrayal and the team is captured. Apophis questions them and has the alternate Hammond killed. Even after they then inform him of the alternate reality they come from, he threatens to kill Jackson. Before he is able to do so the Asgard arrive, forcing most of the Jaffa to flee and resurrecting Hammond. The mission completed, the non-alternate team returns home, but not before O'Neill and the alternate Carter share a kiss.