Working with Merlin’s phasing device, Carter (Amanda Tapping) is mistakenly pulled into a parallel reality where her double is attempting to draw energy from other such realities. With their Carter killed in the experiment the real Carter must step in to help a desperate Stargate Program from stopping a would-be attack from the Ori. Carter is questioned and ultimately recruited to help the efforts by the head of Stargate Command General Hammond (Don Davis). Successfully able to move the entire planet out of phase using Merlin’s device moments before an Ori attack, Carter is hailed a hero by President Landry (Beau Bridges). The President, who has had the country under martial law since the chaos that emerged when the public was made aware of the Stargate, tries to use Carter’s cache as an American-hero to not only convince the public they are again safe but to secure his presidency. Carter soon realizes that the president has no intention of allowing her to try to recreate the experiment that brought her there in hopes of returning home again. She is forced to request the help of her ex-husband a multi-millionaire dot comer named Rodney McKay (David Hewlett) and the advice of a paraplegic ex-302 fighter pilot, Cameron Mitchell (Ben Browder) in a hope to find a way back to her proper reality.