Roy Neary

Richard Dreyfuss

Ronnie Neary

Teri Garr

Claude Lacombe

François Truffaut

Jillian Guiler

Melinda DIllon

Barry Guiler

Cary Guffey

David Laughlin

Bob Balaban

Project Leader

J. Patrick McNamara

Wild Bill

Warren J. Kemmerling

Farmer

Roberts Blossom

ARP Musician

Phil Dodds

Brad Neary

Shawn Bishop

Jean Claude

Philip Dodds

Sylvia Neary

Adrienne Campbell

Toby Neary

Justin Dreyfuss

Robert

Lance Henriksen

Team Leader

Merrill Connally

Major Benchley

George DiCenzo

Implantee

Amy Douglass

Military Policeman

Carl Weathers

Ike

Gene Dynarski

Highway Patrolman

Roger Ernest

Larry Butler

Josef Sommer

Norman Bartold

Norman Bartold

ARP Project Member

F.J. O'Neil

Returnee #2 Flt. 19

Hal Barwood

Hawker

Gene Rader

Returnee #3 Flt. 19

Matthew Robbins

Federale

Daniel Nunez

Federale

Chuy Franco

Federale

Luis Contreras

Longly (uncredited)

Basil Hoffman

Returnee #1 Flt. 19

Randy Herman

Special Forces

Galen Thompson

Special Forces

John Dennis Johnston

Dirty Tricks #3

Robert Broyles

Implantee

Alexander Lockwood

Air Traffic

Bill Thurman

Federale

Eumenio Blanco

Radio Telescope Team

James Keane

Radio Telescope Team

Dennis McMullen

Mrs. Harris

Mary Gafrey

Special Leader

Matt Emery

Himself

Michael J. Dyer

Dirty Tricks #1

Jon Ewing

Returnee #1 Flt. 19

Randy Hermann

Air Traffic Controller

David Anderson

Dirty Tricks #2

Keith Atkinson

Air Traffic Controller

Richard L. Hawkins

Air Traffic

Craig Shreeve

Air East Pilot

Roy E. Richards

Load Dispatcher

Bob Westmoreland

Radio Telescope Team

Cy Young

Radio Telescope Team

Tom Howard

Truck Dispatcher

Richard Stuart

Dirty Tricks #1

John Ewing

Dirty Tricks #4

Kirk Raymond

Special Forces Commander / Helicopter Pilot (uncredited)

Monty Jordan

UN Observer (uncredited)

Stephen Powers

Man Smoking Pipe at Landing Site (uncredited)

J. Allen Hynek

Howard K. Smith (uncredited)

Howard K. Smith