Synopsis by Hal Erickson
Upon returning to the Stargate Complex, the SG-1 crew is injected with sedatives and imprisoned--apparently on the orders of their own commander, General Hammond (Don S. Davis). Carter (Amanda Tapping) and Teal'c (Christopher Judge) subsequently discover that the complex has been taken over by aliens possessing the power of metamorphosis. In their attempts to escape, the crew members are stymied by the fact that the cannot tell their friends from their enemies--even among themselves.
alien [not human], imprisonment, metamorphosis