Dean Jagger

as Self (archive footage)

as Major General Thomas F. Waverly (archive footage) (uncredited)

as Self (archive footage)

as Doctor Schaeffer

as David Domedion

as Slade

as 6th Supreme Court Justice

as Dr. Land

as Ray Collins

as Koehler

as Dr. Shagetz

as Josiah Lowe

as Jim Wallace

as Arnold Edgarton

as Carl Webster

as Frederick Wellman

as Henry Raphael Caine

as Quick

as Professor Bowen

as Matthew Keller

as Warden Auerbach

as Walter Cannell

as Sam Baldwin

as Prospector

as Charlie

as Chad Harmon

as Highwayman

as Top Polk

as Charles Van Cleve

as Judge James C. Brown

as Jimmy Noble

as Whittier

as Colonel Baseman

as Bishop John Atwood

as Principal Albert Vane

as Tony Donovan

as John Noble

as George Davies

as Lt. Gen. John Sparrow

as Admiral Fitch

as Sala Post

as William L. Morgan

as Grant Austen

as Ed Lindsay

as Dr. Hubert Van Der Mal

as Mr. Fisher

as Harry Burleigh

as Anton Rojas

as Sheriff Ned Logan

as J. Fullerton Weldy

as as Rodion Pavlov

as Philip Carleton

as John W. Rogers

as Bert Ensign

as Dr. Adam Royston

as Dr. Hugo Thornton

as Jade Murphy

as Mr. Wyndham

as Vice-Adm. Thomas L. Semple

as Tim Horn

as General Waverly

as Police Capt. Michaels

as Jesse Q. Grimm

as Harry Holt

as Justus

as Adam 'Mister Doc' Darrow

as Phil Baxter

as General William J. Palmer

as Dan Jefferson

as 6th Supreme Court Justice

as Sam Quade

as Ed Gorman

as Yancy

as Captain Garvey

as John Straley

as Jeff Hassard

as Major / Lieutenant Colonel Harvey Stovall

as Cliff Holden, alias William Harrah

as Ben Willson

as Charles Burnett

as Dr. Steve Webster

as Grant

as Kevin Connors

as Sgt. John Patterson

as John Masters

as Paul Baxter

as Rodion Pavlov

as Torgut Lane

as 'Pipestone' Ross

as Jim Sawyer

as David Gibson

as Edward Creighton

as Brigham Young

as Charlie (uncredited)

as Charlie Sears

as James 'Capper' Regan

as Paul Herrick

as Dillman

as Fred Stevens

as Alan Shaw

as Fritz Lind

as Bob O'Ryan

as Armand Louque

as Hap Waller

as 'Honey' Hogan

as Arnold

as Adam Larey

as Agent Jones

as Bill Trask

as Trooper Jim Burton

as Top Harmon

as Thurman

as Pete

as Coach Robbins

as Military School Instructor

as Deputy (uncredited)

as Gerald Morely

as Jim Coakley