Gene Barry

Character: Clayton Forrester

Ann Robinson

Character: Sylvia Van Buren

Lewis Martin

Character: Matthew Collins

Les Tremayne

Character: General Mann

Frank Kreig

Character: Fiddler Hawkins (uncredited)

Vernon Rich

Character: Ralph Heffner

Sandro Giglio

Character: Dr. Bilderbeck

Ann Codee

Character: Dr. Duprey (uncredited)

Robert Cornthwaite

Character: Dr. Pryor

Cedric Hardwicke

Character: Commentary (voice)

Houseley Stevenson Jr.

Character: General Mann's Aide

William Phipps

Character: Wash Perry

Jack Kruschen

Character: Salvatore

Paul Birch

Character: Alonzo Hogue (uncredited)

Paul Frees

Character: Second Radio Reporter / Opening Announcer

Henry Brandon

Character: Cop at Crash Site

Peter Adams

Character: Pine Summit Fire Watcher (uncredited)

Eric Alden

Character: Man (uncredited)

Hugh Allen

Character: Brigadier General (uncredited)

Ruth Barnell

Character: Mother (uncredited)

Edgar Barrier

Character: Prof. McPherson (uncredited)

Russ Bender

Character: Dr. Carmichael (uncredited)

Oscar Blank

Character: Man in Church (uncredited)

Hazel Boyne

Character: Screaming Woman (uncredited)

Chet Brandenburg

Character: Man in Church (uncredited)

George Bruggeman

Character: Soldier (uncredited)

Nora Bush

Character: Woman in Church (uncredited)

Tony Butala

Character: Boy in Final Church (uncredited)

Mushy Callahan

Character: Burning Soldier at Pit (uncredited)

Dick Cherney

Character: Looter (uncredited)

Edward Colmans

Character: Spanish Priest (uncredited)

James Conaty

Character: Man at Pacific Institute of Science and Technology (uncredited)

Russ Conway

Character: Rev. Bethany (uncredited)

Martin Coulter

Character: Marine Sergeant (uncredited)

Vittorio Cramer

Character: First Radio Reporter (uncredited)

Pierre Cressoy

Character: Frenchman (uncredited)

Oliver Cross

Character: Scientist (uncredited)

Jane Crowley

Character: Woman in Church (uncredited)

Jim Davies

Character: Marine Commanding Officer (uncredited)

Helen Dickson

Character: Woman in Church (uncredited)

Ralph Dumke

Character: Buck Monahan (uncredited)

Jimmie Dundee

Character: Civil Defense Official (uncredited)

Al Ferguson

Character: Police Chief (uncredited)

Dick Fortune

Character: Marine Captain (uncredited)

Alex Frazer

Character: Dr. James (uncredited)

Frank Freeman Jr.

Character: Bum #2 Listening to Radio (uncredited)

Slim Gaut

Character: Radio Listener (uncredited)

Charles Gemora

Character: Martian (uncredited)

Ned Glass

Character: Well-Dressed Looter (uncredited)

Jack Gordon

Character: Man in Church (uncredited)

Fred Graham

Character: Looter (uncredited)

Joe Gray

Character: Looter (uncredited)

Herman Hack

Character: Worker Listening to Radio (uncredited)

Nancy Hale

Character: Young Wife (uncredited)

Virginia Hall

Character: Girl (uncredited)

Ted Hecht

Character: KGEB Reporter (uncredited)

Douglas Henderson

Character: Staff Sergeant (uncredited)

Gertrude Hoffmann

Character: Elderly News Vendor (uncredited)

Tex Holden

Character: Man in Church (uncredited)

Jimmie Horan

Character: Party Guest (uncredited)

Patricia Iannone

Character: Girl (uncredited)

Jerry James

Character: Reporter (uncredited)

Michael Jeffers

Character: Worker Listening to Radio (uncredited)

Dick Johnstone

Character: Man in Church (uncredited)

Carolyn Jones

Character: Blonde Party Guest (uncredited)

Don Kohler

Character: Colonel (uncredited)

Ivan Lebedeff

Character: Dr. Gratzman (uncredited)

Freeman Lusk

Character: Secretary of Defense (uncredited)

Herbert Lytton

Character: Chief of Staff (uncredited)

Wilbur Mack

Character: Official (uncredited)

George Magrill

Character: Traffic Cop (uncredited)

Mike Mahoney

Character: Townsman (uncredited)

John Mansfield

Character: Man (uncredited)

Joel Marston

Character: Military Policeman in Jeep (uncredited)

Sydney Mason

Character: Fire Chief, Crew #3 (uncredited)

John Maxwell

Character: Doctor (uncredited)

Mathew McCue

Character: Man in Church (uncredited)

David McMahon

Character: Minister, First Church (uncredited)

William Meader

Character: P.E. Official (uncredited)

Lee Miller

Character: Reporter (uncredited)

Ralph Montgomery

Character: Los Angeles Red Cross Official (uncredited)

Alvy Moore

Character: Zippy (uncredited)

Bob Morgan

Character: Injured Civil Defense Worker (uncredited)

Charles Morton

Character: Worker Listening to Radio (uncredited)

George Nardelli

Character: Military Officer (uncredited)

Stanley Orr

Character: Marine Major (uncredited)

George Pal

Character: Bum #1 Listening to Radio (uncredited)

Walter Richards

Character: Reporter (uncredited)

Robert Rockwell

Character: Forest Ranger at Crash Site (uncredited)

Walter Sande

Character: Sheriff Bogany (uncredited)

James Seay

Character: Air Force Bomber Pilot (uncredited)

Allen D. Sewall

Character: Man in Church (uncredited)

Lucile Sewall

Character: Woman in Church (uncredited)

Cora Shannon

Character: Old Woman (uncredited)

David Sharpe

Character: Looter (uncredited)

Teru Shimada

Character: Japanese Diplomat (uncredited)

Reginald Lal Singh

Character: Military Officer (uncredited)

Bobby Somers

Character: Deputy at Crash Site (uncredited)

Bert Stevens

Character: Man in Church (uncredited)

Charles Stewart

Character: Marine Captain (uncredited)

Jack Stoney

Character: Looter (uncredited)

Gus Taillon

Character: Elderly Man (uncredited)

Morton C. Thompson

Character: Reporter (uncredited)

Arthur Tovey

Character: Party Guest (uncredited)

Dale Van Sickel

Character: Looter (uncredited)

Dorothy Vernon

Character: Elderly Woman at Square Dance (uncredited)

Anthony Warde

Character: Military Police Driver (uncredited)

Bob Whitney

Character: Military Officer (uncredited)

Chalky Williams

Character: Worker Listening to Radio (uncredited)

Waldon Williams

Character: Boy (uncredited)

Bud Wolfe

Character: Rescuing Civil Defense Worker (uncredited)

Fred Zendar

Character: Marine Lieutenant (uncredited)