Brad Crane

Michael Caine

Acting

Capt. Helena Anderson

Katharine Ross

Acting

Gen. Thaddeus Slater

Richard Widmark

Acting

Dr. Hubbard

Richard Chamberlain

Acting

Maureen Schuester

Olivia de Havilland

Acting

Felix

Ben Johnson

Acting

Anne MacGregor

Lee Grant

Acting

Dr. Andrews

José Ferrer

Acting

Rita

Patty Duke

Acting

Jud Hawkins

Slim Pickens

Acting

Maj. Baker

Bradford Dillman

Acting

Maj. Clarance Tuttle

Fred MacMurray

Acting

Dr. Walter Krim

Henry Fonda

Acting

Gen. Thompson

Cameron Mitchell

Acting

Paul Durant

Christian Juttner

Acting

Dr. Newman

Morgan Paull

Acting

Dr. Martinez

Alejandro Rey

Acting

Pete Harris

Don 'Red' Barry

Acting

Woman Scientist

Elizabeth Rogers

Acting

Mrs. Durant

Doria Cook-Nelson

Acting

Mr. Durant

Robert Varney

Acting

Duty Officer

Ernie F. Orsatti

Crew

Sheriff Morrison

Patrick Culliton

Acting

Cameraman

John Furlong

Acting

Hal

Chris Petersen

Acting

Eddie

Jerry Toomey

Acting

Receptionist / Nurse

Barbara Costello

Acting

Nurse

Jenifer Taurins

Acting

Radioman

David Himes

Acting

Secretary

Mara Cook

Acting

Bee Boy

Joey Eisnach

Acting

Radarman

Stephen Powers

Acting

Lieutenant

Chris Capen

Acting

Officer #2

Tony Haig

Acting

Radarman #2

Bill Snider

Acting

Nurse

George Simmons

Acting

Sergeant

Arell Blanton

Acting

Radio Sergeant

Trent Dolan

Acting

Launching Officer

John Williams

Acting

Pilot #1

Steven Marlo

Acting

Mechanic

Phil Montgomery

Acting

Doctor

Jim Galante

Acting

Self

Frank Blair

Acting

Captain

Marcia Nicholson

Acting

Engineer

Arthur Space

Acting

Standby Engineer

Chuck Hayward

Acting

Chemical Warfare Guard

Glenn Charles Lewis

Acting

Radio Announcer

Art Balinger

Acting

Airman #1

Michael Sheehan

Acting

Airman #2

Howard Culver

Acting

Briefing Guest (uncredited)

Buzz Barbee

Acting

Dr. Moore (uncredited)

Ken Clayton

Acting

Train Passenger (uncredited)

Marneen Fields

Crew

Townsman (uncredited)

Bob Harks

Acting

Burning Man (uncredited)

Mike Johnson

Crew

Train Passenger (uncredited)

Jack Krupnick

Acting

Colonel's Son (uncredited)

Lawrence Moran

Acting

Briefing Guest (uncredited)

Monty O'Grady

Acting

Wild Lines (uncredited)

John Otrin

Acting

Briefing Guest (uncredited)

Leoda Richards

Acting

Briefing Guest (uncredited)

Norman Stevans

Acting