George DiCenzo
Major Benchley
Carl Weathers
Military Policeman
François Truffaut
Claude Lacombe
James Keane
Radio Telescope Team
Lance Henriksen
Robert
Richard Dreyfuss
Roy Neary
Melinda Dillon
Jillian Guiler
Teri Garr
Ronnie Neary
Tom Howard
Radio Telescope Team
Gene Dynarski
Ike
Alexander Lockwood
Implantee
Bob Balaban
David Laughlin
J. Patrick McNamara
Project Leader
Warren J. Kemmerling
Wild Bill
Adrienne Campbell
Sylvia Neary
Justin Dreyfuss
Toby Neary
Merrill Connally
Team Leader
Matthew Robbins
Returnee #3 Flt. 19
Hal Barwood
Returnee #2 Flt. 19
Josef Sommer
Larry Butler
Norman Bartold
Norman Bartold
Bill Thurman
Air Traffic
Roberts Blossom
Farmer
Cary Guffey
Barry Guiler
John Dennis Johnston
Special Forces
Luis Contreras
Federale
Basil Hoffman
Longly (uncredited)
Richard L. Hawkins
Air Traffic Controller
Howard K. Smith
Howard K. Smith (uncredited)
Keith Atkinson
Dirty Tricks #2
F.J. O'Neil
ARP Project Member
Robert Broyles
Dirty Tricks #3
Galen Thompson
Special Forces
Bob Westmoreland
Load Dispatcher
Dennis McMullen
Radio Telescope Team
John Ewing
Dirty Tricks #1
Randy Hermann
Returnee #1 Flt. 19
Roger Ernest
Highway Patrolman
Roy E. Richards
Air East Pilot
Cy Young
Radio Telescope Team
Richard Stuart
Truck Dispatcher
Kirk Raymond
Dirty Tricks #4
J. Allen Hynek
Man Smoking Pipe at Landing Site (uncredited)
Monty Jordan
Special Forces Commander / Helicopter Pilot (uncredited)
Stephen Powers
UN Observer (uncredited)
David Anderson
Air Traffic Controller