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)

Man in Church (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)

Woman in Church (uncredited)

Marine Commanding Officer (uncredited)

Woman in Church (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)

Man in Church (uncredited)

Looter (uncredited)

Looter (uncredited)

Worker Listening to Radio (uncredited)

Young Wife (uncredited)

Girl (uncredited)

KGEB Reporter (uncredited)

Staff Sergeant (uncredited)

Elderly News Vendor (uncredited)

Man in Church (uncredited)

Party Guest (uncredited)

Girl (uncredited)

Reporter (uncredited)

Worker Listening to Radio (uncredited)

Man in Church (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)

Man (uncredited)

Military Policeman in Jeep (uncredited)

Fire Chief, Crew #3 (uncredited)

Doctor (uncredited)

Man in Church (uncredited)

Minister, First Church (uncredited)

P.E. Official (uncredited)

Reporter (uncredited)

Los Angeles Red Cross Official (uncredited)

Zippy (uncredited)

Injured Civil Defense Worker (uncredited)

Worker Listening to Radio (uncredited)

Military Officer (uncredited)

Marine Major (uncredited)

Bum #1 Listening to Radio (uncredited)

Reporter (uncredited)

Forest Ranger at Crash Site (uncredited)

Sheriff Bogany (uncredited)

Air Force Bomber Pilot (uncredited)

Man in Church (uncredited)

Woman in Church (uncredited)

Old Woman (uncredited)

Looter (uncredited)

Japanese Diplomat (uncredited)

Military Officer (uncredited)

Deputy at Crash Site (uncredited)

Man in Church (uncredited)

Marine Captain (uncredited)

Looter (uncredited)

Elderly Man (uncredited)

Reporter (uncredited)

Party Guest (uncredited)

Looter (uncredited)

Elderly Woman at Square Dance (uncredited)

Cameraman (uncredited)

Military Police Driver (uncredited)

Military Officer (uncredited)

Worker Listening to Radio (uncredited)

Boy (uncredited)

Rescuing Civil Defense Worker (uncredited)

Marine Lieutenant (uncredited)