Ruth is happy to meet George's daughter; Federico pleads his case to Vanessa; David confronts a demon; Keith considers an unlikely business proposal.
The entire crew takes refuge inside a small maintenance shaft for eight days during a radioactive storm.
Mulder and Scully are stalked by an ancient legion of lethal beings while investigating a boy’s claims that he was attacked by an invisible creature.
Simone and Sipowicz handle a deadly rape case; mystery surrounds a dead man's head; Simone employs Henry at the tenement; Gina returns to work.
While Clark continues to protect an endangered witness, Jones finds himself blamed for Michael's absence in family court.