Prof. Warren

Secretary of the Navy

Tersh Jeterax

Mr. Stillwell

Dr. Henry L. Carlyle

Lycon

Adrian Benedict

Dr. Wells

Self - Narrator (voice)

James McCullough / Ralph Graham

Reagan

Major General Vanderlip

Dr. Bernard Fischer

Jonathan Wilson

Dr. Malcolm Couzzens

Sherman Wadsworth

Dr. Brooks

Anthony Vickers

Milo Bragg

Timothy Bryant

Arthur Evans

Jameson

Ted Darby

Adam Stanton

Blacky Franchot

Napoleon Bonaparte (uncredited) (voice)

Mr. Fred Tiflin

Marchese Del Laudi

Father Massieu, Joan's Bailiff

Brig. Gen. Mel Gilbert

Mr. Wallace Sanford

Earl Huber aka Mathews

Lt. Aleksa Petrovic, Mihailovitch's Aide

Dr. Larry Forbes

Edgar Allan Poe

Henry Clay

Tod Fenwick

Dewey Roberts

Bob Mallory

Roger Chevis

Ed Shirley

Dr. Morton

Lieut. Jerry Banning

Dr. Joseph Goldberger

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

Dr. Gregory 'Greg' Lane

Dr. John 'Jock' McWade

Ned Morgan

Joaquin Murrieta

Dr. Semmelweis