As Scully and Mulder try to deal with the fallout from the actions of a mysterious group that has been targeting anyone associated with the X-Files and causing their return to the Bureau, reports that a creature from their past has returned sends Mulder heading to Martha's Vineyard and Scully to Quantico. Also, witness the return of the informant known only as "X," the rise of the Chittering God, and "More Musings of a Cigarette Smoking Man."