Dr. Clayton Forrester
Sylvia Van Buren
Maj. Gen. Mann
Dr. Pryor (as Bob Cornthwaite)
Dr. Bilderbeck
Pastor Dr. Matthew Collins
Gen. Mann's Aide (as Housely Stevenson Jr.)
Second Radio Reporter / Opening Announcer
Wash Perry (as Bill Phipps)
Col. Ralph Heffner
Cop at Crash Site
Salvatore
Commentary (voice) (as Sir Cedric Hardwicke)
Pine Summit Fire Watcher (uncredited)
Man (uncredited)
Brigadier General (uncredited)
Mother (uncredited)
Prof. McPherson (uncredited)
Dr. Carmichael (uncredited)
Alonzo Hogue (uncredited)
Man in Church (uncredited)
Screaming Woman (uncredited)
Soldier (uncredited)
Woman in Church (uncredited)
Boy in Final Church (uncredited)
Burning Soldier at Pit (uncredited)
Looter (uncredited)
Dr. Duprey (uncredited)
Spanish Priest (uncredited)
Man at Pacific Institute of Science and Technology (uncredited)
Rev. Bethany (uncredited)
Marine Sergeant (uncredited)
First Radio Reporter (uncredited)
Frenchman (uncredited)
Scientist (uncredited)
Marine Commanding Officer (uncredited)
Buck Monahan (uncredited)
Civil Defense Official (uncredited)
Police Chief (uncredited)
Marine Captain (uncredited)
Dr. James (uncredited)
Bum #2 Listening to Radio (uncredited)
Radio Listener (uncredited)
Martian (uncredited)
Well-Dressed Looter (uncredited)
Worker Listening to Radio (uncredited)
Young Wife (uncredited)
Girl (uncredited)
KGEB Reporter (uncredited)
Staff Sergeant (uncredited)
Elderly News Vendor (uncredited)
Party Guest (uncredited)
Reporter (uncredited)
Blonde Party Guest (uncredited)
Colonel (uncredited)
Fiddler Hawkins (uncredited)
Dr. Gratzman (uncredited)
Secretary of Defense (uncredited)
Chief of Staff (uncredited)
Official (uncredited)
Traffic Cop (uncredited)
Townsman (uncredited)
Military Policeman in Jeep (uncredited)
Fire Chief, Crew #3 (uncredited)
Doctor (uncredited)
Minister, First Church (uncredited)
P.E. Official (uncredited)
Los Angeles Red Cross Official (uncredited)
Zippy (uncredited)
Bum (uncredited)
Injured Civil Defense Worker (uncredited)
Military Officer (uncredited)
Marine Major (uncredited)
Bum #1 Listening to Radio (uncredited)
Forest Ranger at Crash Site (uncredited)
Sheriff Bogany (uncredited)
Air Force Bomber Pilot (uncredited)
Old Woman (uncredited)
Japanese Diplomat (uncredited)
Deputy at Crash Site (uncredited)
Elderly Man (uncredited)
Elderly Woman at Square Dance (uncredited)
Cameraman (uncredited)
Military Police Driver (uncredited)
Boy (uncredited)
Rescuing Civil Defense Worker (uncredited)
Marine Lieutenant (uncredited)