Jonathan races to find a cure when his wife and son fall ill; a doctor demands an explanation from Jonathan when he refuses to let her treat Clark.
When Scully is abducted by unseen forces Mulder launches a desperate search to find her, only to be thwarted by a stunning betrayal.
Mulder and Scully uncover a chilling link between a UFO cover-up and secret government experiments.
Assuming Mulder is dead, the FBI strips Scully of her credentials for withholding information about the missing computer disk.
Mulder and Scully learn more about Director Skinner's personal life as they work to unravel a conspiracy and clear him of murder.