War of the Colossal Beast

Sally Fraser

Joyce Manning

Roger Pace

Major Mark Baird

Duncan 'Dean' Parkin

Col. Glenn Manning

Russ Bender

Dr. Carmichael

Rico Alaniz

Sgt. Luis Murillo

George Becwar

John Swanson, truck owner

Roberto Hernández

Miguel

Charles Stewart

Capt. Harris

June Jocelyn

Mrs. Edwards, mother

John McNamara

The Neurologist

Loretta Nicholson

Joan

Raymond Winston

Arthur Lang

Jack Kosslyn

Newscaster

George Navarro

Mexican Doctor

Bob Garnet

Capitol Hill Reporter

Stan Chambers

TV Announcer

June Burt

Laurie Edwards

Howard Wright

Medical Research Official

George Alexander

Army Officer

Bill Giorgio

Bus Driver

Hal Torey

Health and Welfare Department Head

George Milan

Gen. Nelson

Warren Frost

Police Dispatcher

Robert Tetrick

Rod Dana

Roy Gordon

Mayor of Los Angeles

Merritt Stone

Cop (uncredited)