Produced and Directed by Irwin Allen
Based on Novel by Arthur Herzog
Screenplay by Stirling Silliphant
Cinematography by Fred J. Koenekamp
Film Editing by Harold F. Kress
Music by Jerry Goldsmith
Casting by Jack Baur
Production Design by Stan Jolley
Set Decoration by Stuart Reiss
Costume Design by Paul Zastupnevich
Special Photographic Effects : L.B. Abbott
Special Effects : Howard Jensen
Special Effects : Van der Veer Photo Effects
Cast
Michael Caine (Dr. Bradford Crane)
Katharine Ross (Capt. Helena Anderson)
Richard Widmark (Major General Thalius Slater)
Richard Chamberlain (Dr. Hubbard)
Olivia de Havilland (Maureen Schuster)
Ben Johnson (Felix)
Lee Grant (Anne MacGregor)
Jose Ferrer (Dr. Andrews)
Patty Duke Astin (Rita)
Slim Pickens (Jud Hawkins)
Bradford Dillman (Major Baker)
Fred MacMurray (Mayor Clarence Tuttle)
Henry Fonda (Dr. Walter Krim)
Cameron Mitchell (General Thompson)
Christian Juttner (Paul Durant)
Morgan Paull (Dr. Newman)
Alejandro Rey (Dr. Martinez)
Don 'Red' Barry (Pete Harris)
Doria Cook-Nelson (Mrs. Mary Durant)
Robert Varney (Mr. Durant)
Patrick Culliton (Sheriff Morrison)
Ernie F. Orsatti (Duty Officer)
John Furlong (Cameraman)
Chris Petersen (Hal)
Jerry Toomey (Eddie)
Mara Cook (Secretary)
Joey Eisnach (Bee Boy)
Stephen Powers (Radarman)
Chris Capen (Lieutenant)
Tony Haig (Officer #2)
Bill Snider (Radarman #2)
George F. Simmons (Nurse)
Arell Blanton (Sergeant)
Trent Dolan (Radio Sergeant)
John Williams (Launching Officer)
Phil Montgomery (Mechanic)
James Turley (Reverend)
Frank Blair (Himself)
Steven Marlo (Pilot #1)
Marcia Nicholson (Captain)
Arthur Space (Engineer)
Chuck Hayward (Standby Engineer)
Glenn Charles Lewis (Chemical Warfare Guard)
Art Balinger (Radio Announcer)
Michael Sheehan (Airman #1)
Howard Culver (Airman #2)