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.
Gene Barry
Dr. Clayton Forrester
Ann Robinson
Sylvia Van Buren
Lewis Martin
Pastor Dr. Matthew Collins
Les Tremayne
Maj. Gen. Mann
Frank Kreig
Fiddler Hawkins (uncredited)
Vernon Rich
Col. Ralph Heffner
Sandro Giglio
Dr. Bilderbeck
Ann Codee
Dr. Duprey (uncredited)
Robert Cornthwaite
Dr. Pryor (as Bob Cornthwaite)
Cedric Hardwicke
Commentary (voice) (as Sir Cedric Hardwicke)
Houseley Stevenson Jr.
Gen. Mann's Aide (as Housely Stevenson Jr.)
William Phipps
Wash Perry (as Bill Phipps)
Jack Kruschen
Salvatore
Paul Birch
Alonzo Hogue (uncredited)
Paul Frees
Second Radio Reporter / Opening Announcer
Henry Brandon
Cop at Crash Site
Peter Adams
Pine Summit Fire Watcher (uncredited)
Eric Alden
Man (uncredited)
Hugh Allen
Brigadier General (uncredited)
Ruth Barnell
Mother (uncredited)
Edgar Barrier
Prof. McPherson (uncredited)
Russ Bender
Dr. Carmichael (uncredited)
Oscar Blank
Man in Church (uncredited)
Hazel Boyne
Screaming Woman (uncredited)
Chet Brandenburg
Man in Church (uncredited)
George Bruggeman
Soldier (uncredited)
Nora Bush
Woman in Church (uncredited)
Tony Butala
Boy in Final Church (uncredited)
Mushy Callahan
Burning Soldier at Pit (uncredited)
Dick Cherney
Looter (uncredited)
Edward Colmans
Spanish Priest (uncredited)
James Conaty
Man at Pacific Institute of Science and Technology (uncredited)