Brian Aherne

as John Evans / Malcolm Scott

as Emperor Maximilian von Hapsburg

as Capt. Edward John Smith

as Terence 'Terry' O'Neill

as David Garrick

as Jeff Troy

as Capt. Allan Lowell

as Father Carl Hyacinth

as Fred Shalimar

as Dennis Riordan

as Oliver Stevenson

as Lewis Allison

as David

as Self - Guest Host

as Phillip Armstrong, a scientist

as Booth Templeton

as Woolsey

as Self

as Mr. Don

as Reggie

as John Kirk

as Colonel Tafferty