Mutant X infiltrates a group of extraterrestrials, who've lived among us for years, and now pose a threat to humanity's future.
The team finds a near-dead man in the boot of a car. It becomes apparent that he is suffering from amnesia, and may be linked to the disappearance of an heiress.
The team recovers a Roman plate that holds research on a synthetic gill unit tied to the research of a Professor Prendergast. Judson loses the plate when he and the curator are attacked while Gabe and Mac track the doctor to an insane asylum where he insists he is from Atlantis.
