The residents of a small town are excited when a flaming meteor lands in the hills, until they discover it is the first of many transport devices from Mars bringing an army of invaders invincible to any man-made weapon, even the atomic bomb.
Dr. Clayton Forrester
Gene Barry
Sylvia Van Buren
Ann Robinson
Pastor Dr. Matthew Collins
Lewis Martin
Maj. Gen. Mann
Les Tremayne
Fiddler Hawkins (uncredited)
Frank Kreig
Col. Ralph Heffner
Vernon Rich
Dr. Bilderbeck
Sandro Giglio
Dr. Duprey (uncredited)
Ann Codee
Dr. Pryor (as Bob Cornthwaite)
Robert Cornthwaite
Commentary (voice) (as Sir Cedric Hardwicke)
Cedric Hardwicke
Gen. Mann's Aide (as Housely Stevenson Jr.)
Houseley Stevenson Jr.
Wash Perry (as Bill Phipps)
William Phipps
Salvatore
Jack Kruschen
Alonzo Hogue (uncredited)
Paul Birch
Second Radio Reporter / Opening Announcer
Paul Frees
Cop at Crash Site
Henry Brandon
Pine Summit Fire Watcher (uncredited)
Peter Adams
Man (uncredited)
Eric Alden
Brigadier General (uncredited)
Hugh Allen
Mother (uncredited)
Ruth Barnell
Prof. McPherson (uncredited)
Edgar Barrier
Dr. Carmichael (uncredited)
Russ Bender
Man in Church (uncredited)
Oscar Blank
Screaming Woman (uncredited)
Hazel Boyne
Man in Church (uncredited)
Chet Brandenburg
Soldier (uncredited)
George Bruggeman
Woman in Church (uncredited)
Nora Bush
Boy in Final Church (uncredited)
Tony Butala
Burning Soldier at Pit (uncredited)
Mushy Callahan
Looter (uncredited)
Dick Cherney
Spanish Priest (uncredited)
Edward Colmans
Man at Pacific Institute of Science and Technology (uncredited)
James Conaty
Rev. Bethany (uncredited)
Russ Conway
Marine Sergeant (uncredited)
Martin Coulter
First Radio Reporter (uncredited)
Vittorio Cramer
Frenchman (uncredited)
Pierre Cressoy
Scientist (uncredited)
Oliver Cross
Woman in Church (uncredited)
Jane Crowley
Marine Commanding Officer (uncredited)
Jim Davies
Woman in Church (uncredited)
Helen Dickson
Buck Monahan (uncredited)
Ralph Dumke
Civil Defense Official (uncredited)
Jimmie Dundee
Police Chief (uncredited)
Al Ferguson
Marine Captain (uncredited)
Dick Fortune
Dr. James (uncredited)
Alex Frazer
Bum #2 Listening to Radio (uncredited)
Frank Freeman Jr.
Radio Listener (uncredited)
Slim Gaut
Martian (uncredited)
Charles Gemora
Well-Dressed Looter (uncredited)
Ned Glass
Man in Church (uncredited)
Jack Gordon
Looter (uncredited)
Fred Graham
Looter (uncredited)
Joe Gray
Worker Listening to Radio (uncredited)
Herman Hack
Young Wife (uncredited)
Nancy Hale
Girl (uncredited)
Virginia Hall
KGEB Reporter (uncredited)
Ted Hecht
Staff Sergeant (uncredited)
Douglas Henderson
Elderly News Vendor (uncredited)
Gertrude Hoffmann
Man in Church (uncredited)
Tex Holden
Party Guest (uncredited)
Jimmie Horan
Girl (uncredited)
Patricia Iannone
Reporter (uncredited)
Jerry James
Worker Listening to Radio (uncredited)
Michael Jeffers
Man in Church (uncredited)
Dick Johnstone
Blonde Party Guest (uncredited)
Carolyn Jones
Colonel (uncredited)
Don Kohler
Dr. Gratzman (uncredited)
Ivan Lebedeff
Secretary of Defense (uncredited)
Freeman Lusk
Chief of Staff (uncredited)
Herbert Lytton
Official (uncredited)
Wilbur Mack
Traffic Cop (uncredited)
George Magrill
Townsman (uncredited)
Mike Mahoney
Man (uncredited)
John Mansfield
Military Policeman in Jeep (uncredited)
Joel Marston
Fire Chief, Crew #3 (uncredited)
Sydney Mason
Doctor (uncredited)
John Maxwell
Man in Church (uncredited)
Mathew McCue
Minister, First Church (uncredited)
David McMahon
P.E. Official (uncredited)
William Meader
Reporter (uncredited)
Lee Miller
Los Angeles Red Cross Official (uncredited)
Ralph Montgomery
Zippy (uncredited)
Alvy Moore
Injured Civil Defense Worker (uncredited)
Bob Morgan
Worker Listening to Radio (uncredited)
Charles Morton
Military Officer (uncredited)
George Nardelli
Marine Major (uncredited)
Stanley Orr
Bum #1 Listening to Radio (uncredited)
George Pal
Reporter (uncredited)
Walter Richards
Forest Ranger at Crash Site (uncredited)
Robert Rockwell
Sheriff Bogany (uncredited)
Walter Sande
Air Force Bomber Pilot (uncredited)
James Seay
Man in Church (uncredited)
Allen D. Sewall
Woman in Church (uncredited)
Lucile Sewall
Old Woman (uncredited)
Cora Shannon
Looter (uncredited)
David Sharpe
Japanese Diplomat (uncredited)
Teru Shimada
Military Officer (uncredited)
Reginald Lal Singh
Deputy at Crash Site (uncredited)
Bobby Somers
Man in Church (uncredited)
Bert Stevens
Marine Captain (uncredited)
Charles Stewart
Looter (uncredited)
Jack Stoney
Elderly Man (uncredited)
Gus Taillon
Reporter (uncredited)
Morton C. Thompson
Party Guest (uncredited)
Arthur Tovey
Looter (uncredited)
Dale Van Sickel
Elderly Woman at Square Dance (uncredited)
Dorothy Vernon
Military Police Driver (uncredited)
Anthony Warde
Military Officer (uncredited)
Bob Whitney
Worker Listening to Radio (uncredited)
Chalky Williams
Boy (uncredited)
Waldon Williams
Rescuing Civil Defense Worker (uncredited)
Bud Wolfe
Marine Lieutenant (uncredited)
Fred Zendar