Mulder and Scully, now taken off the FBI's X Files cases, must find a way to fight the shadowy elements of the government to find out the truth about a conspiracy that might mean the alien colonization of Earth.
Agent Fox Mulder
David Duchovny
Agent Dana Scully
Gillian Anderson
Assistant Director Walter Skinner
Mitch Pileggi
The Cigarette-Smoking Man
William B. Davis
The Well-Manicured Man
John Neville
Kurtzweil
Martin Landau
Bronschweig
Jeffrey DeMunn
Frohike
Tom Braidwood
Cassidy
Blythe Danner
Michaud
Terry O'Quinn
Langly
Dean Haglund
Byers
Bruce Harwood
Strughold
Armin Mueller-Stahl
Stevie
Lucas Black
2nd Boy
Christopher Fennell
3rd Boy
Cody Newton
4th Boy
Blake Stokes
Group Elder
Don S. Williams
2nd Elder
George Murdock
Black-Haired Man
Michael Shamus Wiles
Primitive #1
Darrell Davis
Primitive #2
Carrick O'Quinn
Creature #1
Tom Woodruff Jr.
Creature #2
Greg Ballora
FBI Agent on Roof
Ted King
FBI Agent
Luis Beckford
Field Agent
Steve Rankin
Fire Captain Cooles
Gary Grubbs
Last Agent Out
Steven M. Gagnon
DC Cop
Larry Joshua
DC Cop #2
Glendon Rich
Security Guard
Gunther Jenson
Technician
Scott Alan Smith
Well-Manicured Man's Valet
Ian Ruskin
Control Room Operator
Paul Welterlen
Young Naval Guard
Joel Traywick
British Valet
Milton Johns
2nd Paramedic
Michael Krawic
Towncar Driver
Larry Rippenkroeger
Buzz Mihoe
Josh McLaglen
Windbreakered Agent
Randy Hall
Fireman
T.C. Badalato
Tunisian
Amine Zary
Pilot
David Paris
Young Samantha Mulder (archive footage)
Vanessa Morley
FBI Man at Bomb Site (uncredited)
Jason Beghe
Barmaid (uncredited)
Glenne Headly