as Brig. Gen. Robert O'Brien

as Emir Hassan

as Dr. Franz Edelmann

as Sam Bellows

as Dr. Matt Higgins

as Igor Braun

as Dr. Walters

as Johnny Achilles

as Jack Lestrade

as Rudolph Von Preissing

as Pecos Kane

as John Grayson

as Brock Danvers

as Dr. Roy Stark

as John P. Tedesco

as Hearn

as Field

as J. Stanley McMasters

as George Harland

as Guy Polli

as Lt. Dearborn

as Dr. John Kendrick

as Dr. W.L. Janz, M.D.

as Aramis

as Chief Agent Alec Conrad

as Dr. Franz Edlemann (archive footage)

as Dr. Franz Edlemann (archive footage)

as Frank Faber

as Sir Gerald 'Jerry' Markham

as Stanley Stanfield

as Jayda McQueen

as Dr. Frank Norton

as Ellis

as Holden

as Mr. Nickerson

as Grover Johnson

as Dan 'Ace' Cartwright / Henry Mathews

as Walter Van Runkle

as Nate Girard

as Cmdr. James McLean

as Don Phillips

as Steve Nichols, alias Steve Cummings

as Carl Cutler

as Professor Brandt

as Prof. John Applegate

as Dan Adams

as Jeffrey 'Jeff' Powell

as Counsellor Doone

as Bob Dunbar

as Jim Summers

as Dr. Joel Becker

as Judge Williams

as Tom Hannegan

as Walter

as Dr. Jim Borden

as Mr. Shaw

as John Hawley

as Jack Hanway

as Dr. Foster

as Prince Michael

as Joe Baldwin

as Lyn Durland

as Tom Crosby

as Frederick Keller

as Richard Evans

as Capt. Jim Martin

as Farraday

as Gen. de la Garance

as Lawrence Vail

as Bob Stevens

as Gregg Jackson

as Col. Ethan Waters

as Lugal

as Attorney Palmer

as Francis Scott Graham

as Joshua Davis

as Barnard

as Mr. Lassiter

as Calvin Brown

as Gen. Nathan Keller

as Henchman (uncredited)

as Mr. Wendi

as Harry Rogers

as Self (archive footage)

as Carl Hughes

as Captain Allen

as Carl

as Sidney Lennox