Reinhold Niebuhr (voice)
Whizzer
Mayday (voice)
Judge Harden
Preston Blair
Frank Yates
Old Jacob
Abner Meecham
Papa
Ronald "Ron" Franz
Self - Narrator (voice)
Self - Narrator (voice)
The Professor
Arthur Jacobs
Narrator (voice)
Tom Walker
Himself
Congressman Doyle
Narrator
Harold L. Ickes
Ak - Master Woodsman of the World (voice)
'Mr. Pappy'
Isaac Green
Roy O'Dell
Smitty
Boyd Callahan
Senator Rupert Hornbeck
Man on the Beach
Dr. Franklin Hill
Alexander Miller
Lloyd Flanders
Sheriff Rogers
Uncle Ren Corvin
Narrator
Amphitryon (voice)
Cranston (voice)
Admiral Henshaw
Doctor Evans
Narrator
Adm. Kelso
Wild Bill McKenzie
Wild Bill McKenzie
William McKenzie
Oliver Lambert
Jim Smith
Dr. Beardsley
Jim Coltrane
Gen. George Marshall
Hamilton "Ham" Johnson
Joseph Bundy
Archbishop Mosely
Lou Mannheim
Sam Nash
President Maxwell Monroe
Grandpa Grier
Benjamin Caulfield
Henry Northrup (segment "The Crate")
Jim MacVey
John Webster
President Adam Scott
Bud Johansen
Father Malone
Paul Steward
Cmdr. Jeremiah A. Denton
J.R. Swackhammer
Arthur Sinclair
Self - Host
Dr. James Kelloway
Alan
Harry
Stage manager
Cmdr. Joseph Rochefort
Himself - Host
Deep Throat
Self (archive footage)
Lieutenant Briggs
The Elder (voice)
Capt. Lloyd Bucher
Dr. Warren G. Watkins
Doug Salter
Harlan Webb
Larry Hackett
Matthew Sand
Mitch Collins
Cameron
David Hoffman
Hays Stowe
Chancellor Graham
Man at the Table (uncredited)
Sen. Johnny Fergus
Mark Twain (Samuel Langhorne Clemens)
Tom Wingfield
Gus Leroy
Pete
