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S10, E6: As a mysterious and fatal pandemic sweeps across the USA and other parts of the globe, Scully desperately tries to find a cure using her own altered DNA. Meanwhile, a desperately ill Mulder confronts the cigarette smoking man who is behind it all, but another figure from Mulder and Scully's past may prove to be the key to their salvation.
Sci-Fi · 22 Feb 2016 · 41 min