Stargate SG-1: Season 3, Episode 6 - ProjectFreeTV

3 - 6: Point of View

Alternate reality versions of Carter and Kawalsky use the quantum mirror to arrive at a secured building in the top secret Area 51 in "our" universe. When the alternate Carter begins to feel the effects of temporal distortion, SGC must come up with a plan to send the alternates back and help them defeat their Apophis.