Sally Fraser as Joyce Manning

Roger Pace as Major Mark Baird

Duncan 'Dean' Parkin as Col. Glenn Manning

Russ Bender as Dr. Carmichael

Rico Alaniz as Sgt. Luis Murillo

George Becwar as John Swanson, truck owner

Roberto Hernández as Miguel

Charles Stewart as Capt. Harris

June Jocelyn as Mrs. Edwards, mother

John McNamara as The Neurologist

Loretta Nicholson as Joan

Raymond Winston as Arthur Lang

Jack Kosslyn as Newscaster

George Navarro as Mexican Doctor

Bob Garnet as Capitol Hill Reporter

Stan Chambers as TV Announcer

June Burt as Laurie Edwards

Howard Wright as Medical Research Official

George Alexander as Army Officer

Bill Giorgio as Bus Driver

Hal Torey as Health and Welfare Department Head

George Milan as Gen. Nelson

Warren Frost as Police Dispatcher

Robert Tetrick as

Rod Dana as

Roy Gordon as Mayor of Los Angeles

Merritt Stone as Cop (uncredited)