Dr. Clayton Forrester
Sylvia Van Buren
Pastor Dr. Matthew Collins
Maj. Gen. Mann
Fiddler Hawkins (uncredited)
Col. Ralph Heffner
Dr. Bilderbeck
Dr. Duprey (uncredited)
Dr. Pryor (as Bob Cornthwaite)
Commentary (voice) (as Sir Cedric Hardwicke)
Gen. Mann's Aide (as Housely Stevenson Jr.)
Wash Perry (as Bill Phipps)
Salvatore
Alonzo Hogue (uncredited)
Second Radio Reporter / Opening Announcer
Cop at Crash Site
Pine Summit Fire Watcher (uncredited)
Man (uncredited)
Brigadier General (uncredited)
Mother (uncredited)
Prof. McPherson (uncredited)
Dr. Carmichael (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)
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)
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)
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)