When members of an Arctic research team mysteriously kill each other and themselves only days after drilling deeper into the ice than ever before, Mulder and Scully accompany a team of doctors and scientists to investigate. They discover an organism that infects living creatures and accelerates the hosts' feelings of anger and paranoia, and the agents' colleagues on the expedition begin to question their government knowledge.
Elenco: Gillian Anderson , David Duchovny , Mitch Pileggi , William B. Davis , Annabeth Gish , Bruce Harwood , Cary Elwes , Dean Haglund , James Pickens Jr. , Nicholas Lea , Tom Braidwood , William B. Davis .