Plot summary
Scully is hospitalized after having a seizure brought on by a vision of the future that involved William, her and Mulder's son. Mulder sets out to investigate, inadvertently crossing paths with former Syndicate members Mr. Y and Erika Price, whose mission is to colonize the universe. Walter Skinner is detained by Monica Reyes and the Smoking Man, who offers protection against the coming human-alien war. Skinner seems only interested in helping Mulder and Scully, by looking for William. The Smoking Man reveals that he fathered William by pairing his DNA with aliens and impregnating Scully.
Credits
Adapted from Wikipedia contributors, The X-Files season 11. HTML formatting and reference markers removed.