ATTORI:

• 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))
• Russ Conway (Rev. Bethany (uncredited))
• Martin Coulter (Marine Sergeant (uncredited))
• Vittorio Cramer (First Radio Reporter (uncredited))
• Pierre Cressoy (Frenchman (uncredited))
• Oliver Cross (Scientist (uncredited))
• Jane Crowley (Woman in Church (uncredited))
• Jim Davies (Marine Commanding Officer (uncredited))
• Helen Dickson (Woman in Church (uncredited))
• Ralph Dumke (Buck Monahan (uncredited))
• Jimmie Dundee (Civil Defense Official (uncredited))
• Al Ferguson (Police Chief (uncredited))
• Dick Fortune (Marine Captain (uncredited))
• Alex Frazer (Dr. James (uncredited))
• Frank Freeman Jr. (Bum #2 Listening to Radio (uncredited))
• Slim Gaut (Radio Listener (uncredited))
• Charles Gemora (Martian (uncredited))
• Ned Glass (Well-Dressed Looter (uncredited))
• Jack Gordon (Man in Church (uncredited))
• Fred Graham (Looter (uncredited))
• Joe Gray (Looter (uncredited))
• Herman Hack (Worker Listening to Radio (uncredited))
• Nancy Hale (Young Wife (uncredited))
• Virginia Hall (Girl (uncredited))
• Ted Hecht (KGEB Reporter (uncredited))
• Douglas Henderson (Staff Sergeant (uncredited))
• Gertrude Hoffmann (Elderly News Vendor (uncredited))
• Tex Holden (Man in Church (uncredited))
• Jimmie Horan (Party Guest (uncredited))
• Patricia Iannone (Girl (uncredited))
• Jerry James (Reporter (uncredited))
• Michael Jeffers (Worker Listening to Radio (uncredited))
• Dick Johnstone (Man in Church (uncredited))
• Carolyn Jones (Blonde Party Guest (uncredited))
• Don Kohler (Colonel (uncredited))
• Ivan Lebedeff (Dr. Gratzman (uncredited))
• Freeman Lusk (Secretary of Defense (uncredited))
• Herbert Lytton (Chief of Staff (uncredited))
• Wilbur Mack (Official (uncredited))
• George Magrill (Traffic Cop (uncredited))
• Mike Mahoney (Townsman (uncredited))
• John Mansfield (Man (uncredited))
• Joel Marston (Military Policeman in Jeep (uncredited))
• Sydney Mason (Fire Chief, Crew #3 (uncredited))
• John Maxwell (Doctor (uncredited))
• Mathew McCue (Man in Church (uncredited))
• David McMahon (Minister, First Church (uncredited))
• William Meader (P.E. Official (uncredited))
• Lee Miller (Reporter (uncredited))
• Ralph Montgomery (Los Angeles Red Cross Official (uncredited))
• Alvy Moore (Zippy (uncredited))
• Bob Morgan (Injured Civil Defense Worker (uncredited))
• Charles Morton (Worker Listening to Radio (uncredited))
• George Nardelli (Military Officer (uncredited))
• Stanley Orr (Marine Major (uncredited))
• George Pal (Bum #1 Listening to Radio (uncredited))
• Walter Richards (Reporter (uncredited))
• Robert Rockwell (Forest Ranger at Crash Site (uncredited))
• Walter Sande (Sheriff Bogany (uncredited))
• James Seay (Air Force Bomber Pilot (uncredited))
• Allen D. Sewall (Man in Church (uncredited))
• Lucile Sewall (Woman in Church (uncredited))
• Cora Shannon (Old Woman (uncredited))
• David Sharpe (Looter (uncredited))
• Teru Shimada (Japanese Diplomat (uncredited))
• Reginald Lal Singh (Military Officer (uncredited))
• Bobby Somers (Deputy at Crash Site (uncredited))
• Bert Stevens (Man in Church (uncredited))
• Charles Stewart (Marine Captain (uncredited))
• Jack Stoney (Looter (uncredited))
• Gus Taillon (Elderly Man (uncredited))
• Morton C. Thompson (Reporter (uncredited))
• Arthur Tovey (Party Guest (uncredited))
• Dale Van Sickel (Looter (uncredited))
• Dorothy Vernon (Elderly Woman at Square Dance (uncredited))
• Edward Wahrman (Cameraman (uncredited))
• Anthony Warde (Military Police Driver (uncredited))
• Bob Whitney (Military Officer (uncredited))
• Chalky Williams (Worker Listening to Radio (uncredited))
• Waldon Williams (Boy (uncredited))
• Bud Wolfe (Rescuing Civil Defense Worker (uncredited))
• Fred Zendar (Marine Lieutenant (uncredited))