The SGC is taken over by aliens and Carter and Teal'c are the only ones who can stop them. The aliens used a sort of cloning technology to look and have the memories of all of the SGC members, but they are unable to use it on Teal'c and Carter. Carter contacts Colonel Maybourne and he eventually comes in at the end with soldiers and takes the aliens down with the help of Carter, Teal'c, Jack, and the guy I can never remember the name of. Some of the aliens got through the gate while other blew themselves up. Anyways, good episode with an interesting idea.
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