*In an effort to take over Earth in the episode "Foothold," the aliens of P3X-118 employ electronic devices to duplicate the image of a human host and to access the human's mind and thoughts. The human is kept alive in suspended animation until the alien either dies or disconnects the devices. This procedure failed to work on Teal'c and Major Carter because their body chemistries had been altered by the presence of The Goa'uld symbiot.
*Source: back of card