When Amanda prepares for an autopsy on another of the victims of a mass shooting with a bullet in his head, the unidentified "corpse" suddenly rises from the slab, knocks her out and disappears, but stays in the hospital and steals all he needs to operate on himself. After he violently deals with other people in his way, including kidnapping Jesse's girlfriend Susan, the NSA walks in, claiming he's an international terrorist, but Mark doesn't buy that story and guesses, once a major bacteriological infection is found in his blood, the even graver truth...
Did You Know?
The show makes the common mistake that the NSA, which is an intelligence agency that accumulates information from various sources, also has agents that operate in the field. This isn't the case, as the Agency only accumulates information from sources, and passes it on to the appropriate agency (the FBI or CIA), who then send their agents into action. See more