Gary Merrill

as Bill Sampson

as Joseph Paradine

as Sgt. Rockwell

as Dan Hoyle

as Gideon Spilitt

as Tommy Scalise

as Senator Leroy Clark

as Colonel Keith Davenport

as Dr. James Hamilton / Major Roger Brothers

as Capt. August

as Douglas McCann

as John Pemberton

as Police Lt. Lawrence Mathews

as Major Colton

as Narrator (voice) (uncredited)

as George Bates

as Col. Devlin

as Sam Burton

as Fred Sargent

as Mark Corlane

as David Trask

as Squint Calloway

as Lt. Cmdr. Pete Vincent

as Dr. LaSatier

as Pa Demara

as Backstage MP on Right (uncredited)

as Self

as Orlando 'Cord' Corday

as Dr. August 'Gus' Boren

as Raymond Garth

as Walter Dietrich

as Pap

as Self (archive footage)

as The Poet

as James Dougherty

as Paul Gormay

as Willie Brogan

as Richard Morton

as John Danforth

as Dub Stokes

as Cmdr E.T. Kramer

as Brock Marsh (alias Zachary Paige)

as Col. Boyd Nelson

as Captain Steve Williams

as Doyle Magee

as Felice Benuzzi

as Self (archive footage)

as Bill Masters

as Dick Bowen

as General Philip Sheridan

as Dr. Seth Pawling

as Dr. Peter Roberts

as McMasters

as Inspector Otis

as Street Man

as Narrator

as Narrator

as John Beasley / Nash

as Max Wilson

as George Dennison

as Adm. Thomas E. Moorer

as Mark Jordan

as Captain McIntyre

as Karl Lippert

as Marshal Duncan

as Narrator (voice)

as Dr. Thomas Madsen

as Narrator

as Jack Blain

as Bob Scoffield

as Capt. Hull

as Gordon Craig

as Self - Narrator (voice)

as Narrator (voice)

as Walter Hubbard

as Narrator

as Self (archive footage)

as John Pemberton

as Dr. Leonard Gillespie