Melvyn Douglas

as Monsieur Zy

as Benjamin Rand

as Senator Carmichael

as Count Leon d'Algout

as Homer Bannon

as Penderel

as Bill Cole

as John J. McKay

as Frank Burton Cheyne

as John Jaffrey

as Zachariah Guthrie

as Admiral William Jessup

as The Dansker, Sailmaker

as Anthony 'Tony' Halton

as Karl Brettschneider

as Dr. Gustaf Segert

as Dr. Mark Ryder

as Larry Baker

as Michael Grant

as Luke Jordan

as (archive footage)

as Tom Garrison

as Jeff Hogarth

as Frederick Larbaud

as Senator Birney

as Roy Darwin

as Brice Chamberlain

as Self

as Lawrence 'Larry' Blake

as Henry Lowndes

as Warren Trent

as Armand De Glasse

as Self

as Henry Linden

as Self - Guest

as Paul Beaurevel

as William H. Reardon

as Tony Robson

as Smithfield 'Smitty' Cobb

as John Randolph

as Burton Strang

as Count Bruno Varelli

as Jeff Thompson

as Col. Claude Brackenbury

as Cyril Ritchard

as Ronald Brooke

as Kenny Williams

as Joel Sloane

as Jim Fletcher

as Gen. Parker

as Michael 'Mike' Holmes

as Grandpa

as Vincent Bullitt

as Joseph Provo

as Rene Farrand aka Arsene Lupin

as George Potter

as George Sartoris

as Michael Lanyard

as Max Reich

as Police Captain Earl Kreski

as Henry Drummond

as Grandpa Doc

as Richard Gordon

as David

as Michael Cassidy

as Stephen Blake

as Judge Earl Chapman

as James Strickland

as Nicholas Prax

as Leon (archive footage)

as Professor Arthur Barris

as Self (archive footage)

as Frank Bradley

as David

as Tice Collins

as William 'Bill' Reardon

as Self (archive footage)

as Jerome 'Jerry' Marvin

as Charles Stanton

as Dr. Lawrence Strelson

as Philip 'Phil' Marvin

as Deputy Governor Danforth

as (archive footage)

as Self - Guest Host

as Richard Barclay

as Capt. Andre Verlaine

as James Guthrie

as Keller Floran

as Richard Stark

as Self

as George R. 'Traps' Stuart

as Clive Heath

as Jeff Seabrook

as Henry Drummond

as David Rolfe

as Martin

as Self (archive footage)

as Self

as Barton Powell

as Paul Boliet

as Dr. Paul Harelson

as Donald's Father

as Peter Schermann

as Self

as Dr. Walter Tradnor

as Melvyn Douglas

as Gen. Parker

as Self (archive footage)

as Stateman Benjamin Franklin

as Stalin

as Self - Host

as Howard Hoagland