Steve Barclay

as Marco

as Stefano Carli

as Georges Villiers, duc de Buckingham

as Conduttore della biga

as Stefano

as Paolo

as George Whitmore

as Marco Adinolfi

as Cap. Droet

as Jeff Regan

as Bruce Landy

as M.P. (uncredited)

as Naval Officer (uncredited)

as Smiley Gordon

as Tracy

as Ted Cummings (as Stephen Barclay)

as Eddie Wheeler

as Captain James Glover

as Tom's Classmate (uncredited)

as Flier (uncredited)

as Kenny Revere