Albert Martino (as James Callahan)

Arliss

Principal Watson

Jury Foreman

Randolph Brascoe

Samuel Cavanaugh

Chief Massey

Oliver

Mr. Bowman

Col. Peck

Police Chief

Unknown

Unknown

Robert Truesdale

Dennis Reilly

Erhardt

Uncle Bob

Unknown

Father O'Neill

Phil

Berlin Hughes

Walter Powell

Unknown

Doctor Houser

Test Director

Dr. Fallone

Emmett DeVore

Jeff Barnes

Sheriff Bruckner

Unknown

Unknown

Unknown

Walter Ames

Gen. Almond

Walt Lawson

Unknown

Garland Dupree

Lew Farragut

Unknown

David Powers, Special Assistant to the President

Leslie Hartman

Unknown

Reg Hanley

Jerry

Fillmore

Miles Wellman

Ensign Beard

Richard Schaefer

Richard Lenk

Dick O'Connell

Barnes

Russ Haynes

Joe Donovan

Reicher

Unknown

FBI Agent (uncredited)

Larry McKay

Unknown

Unknown

Unknown

Unknown

Doug Kirk

Police Officer Wilson

Fred Carlyle