as John Jacob Astor
as Dr. Otto Hasslein
as Dr. Robert Hoak (swimming double) (uncredited)
as Elton Deedle
as Klaus
as Dr Charles Forbin
as Lt. Franz Von Klemme
as Reese Paxton
as Max Eikhart
as The Doctor
as Ernest Graeber
as Leonard Nero
as Self
as Frederico Caprio
as Stoeffer
