as Jonathan Wilson

as Mr. Fred Tiflin

as Earl Huber aka Mathews

as Adam Stanton

as Anthony Vickers

as Marchese Del Laudi

as Blacky Franchot

as Ted Darby

as Milo Bragg

as Major General Vanderlip

as Dr. Malcolm Couzzens

as Sherman Wadsworth

as Father Massieu, Joan's Bailiff

as Dr. Larry Forbes

as Dr. John 'Jock' McWade

as Lycon

as Ed Shirley

as Dewey Roberts

as Lieut. Jerry Banning

as Adrian Benedict

as Dr. Morton

as Dr. Gregory 'Greg' Lane

as Mr. Wallace Sanford

as Edgar Allan Poe

as James McCullough / Ralph Graham

as Ned Morgan

as Henry Clay

as Timothy Bryant

as Dr. Henry L. Carlyle

as Tersh Jeterax

as Self - Narrator (voice)

as Reagan

as Dr. Semmelweis

as Dr. Bernard Fischer

as Mr. Stillwell

as Prof. Warren

as Lt. Aleksa Petrovic, Mihailovitch's Aide

as Roger Chevis

as Brig. Gen. Mel Gilbert

as Secretary of the Navy

as Dr. Brooks

as Bob Mallory

as Tod Fenwick

as Napoleon Bonaparte (uncredited) (voice)

as Jameson

as Arthur Evans

as Joaquin Murrieta

as Narrator / Tom Thumb's Father (voice) (uncredited)

as Dr. Joseph Goldberger

as Dr. Wells