Carolyn Jones Blonde Party Guest (uncredited)
Pierre Cressoy Frenchman (uncredited)
Gene Barry Clayton Forrester
Henry Brandon Cop at Crash Site
Dorothy Vernon Elderly Woman at Square Dance (uncredited)
Cedric Hardwicke Commentary (voice)
William Phipps Wash Perry
Paul Birch Alonzo Hogue (uncredited)
Paul Frees Second Radio Reporter / Opening Announcer
Russ Conway Rev. Bethany (uncredited)
George Bruggeman Soldier (uncredited), Stunts
Michael Jeffers Worker Listening to Radio (uncredited)
Tex Holden Man in Church (uncredited), Stunts
Lee Miller Reporter (uncredited)
Herman Hack Worker Listening to Radio (uncredited), Stunts
Eric Alden Man (uncredited)
Joel Marston Military Policeman in Jeep (uncredited)
William Meader P.E. Official (uncredited)
Ned Glass Well-Dressed Looter (uncredited)
Teru Shimada Japanese Diplomat (uncredited)
Loren L. Ryder Sound Director
Ann Robinson Sylvia Van Buren
Bert Stevens Man in Church (uncredited)
Mike Mahoney Townsman (uncredited)
Charles Stewart Marine Captain (uncredited)
Paul K. Lerpae Visual Effects
Charles Morton Worker Listening to Radio (uncredited), Stunts
Helen Dickson Woman in Church (uncredited)
Russ Bender Dr. Carmichael (uncredited)
Dick Johnstone Man in Church (uncredited)
Jack Stoney Looter (uncredited), Stunts
Byron Haskin Director
Edith Head Costume Design
Peter Adams Pine Summit Fire Watcher (uncredited)
Cecil B. DeMille Executive Producer
Fred Graham Looter (uncredited), Stunts
Ralph Dumke Buck Monahan (uncredited)
Jack Kruschen Salvatore
Herbert Lytton Chief of Staff (uncredited)
H. G. Wells Novel
James Seay Air Force Bomber Pilot (uncredited)
Arthur Tovey Party Guest (uncredited)
Les Tremayne General Mann
A. Edward Sutherland Special Effects
Cora Shannon Old Woman (uncredited)
Robert Cornthwaite Dr. Pryor
Douglas Henderson Staff Sergeant (uncredited)
Edgar Barrier Prof. McPherson (uncredited)
Fred Zendar Marine Lieutenant (uncredited), Stunts
George Pal Bum #1 Listening to Radio (uncredited), Producer
Wilbur Mack Official (uncredited)
Chet Brandenburg Man in Church (uncredited), Stunts
Walter Sande Sheriff Bogany (uncredited)
Mathew McCue Man in Church (uncredited)
Lewis Martin Matthew Collins
Alvy Moore Zippy (uncredited)
Jack Gordon Man in Church (uncredited)
Leith Stevens Original Music Composer
Sandro Giglio Dr. Bilderbeck
Michael D. Moore Assistant Director
Robert Rockwell Forest Ranger at Crash Site (uncredited)
Ann Codee Dr. Duprey (uncredited)
Hal Pereira Art Direction
Nora Bush Woman in Church (uncredited)
Charles Gemora Martian (uncredited), Costumer
Dale Van Sickel Looter (uncredited), Stunts
Allen D. Sewall Man in Church (uncredited)
Dick Cherney Looter (uncredited)
Anthony Warde Military Police Driver (uncredited)
George Barnes Director of Photography
Bud Wolfe Rescuing Civil Defense Worker (uncredited), Stunts
John Maxwell Doctor (uncredited)