I'm not a Douglas Sirk fan, but this one I thought was masterfully directed. Stunningly photographed too by Clifford Stine! Alas, this improbable adventure thriller begins to lose its grip about three- quarters of the way through -- mostly due to the very mediocre and totally uninspired acting of the miscast Macdonald Carey who turns his hero into a very flaccid figure indeed! Robert Douglas is not happy in his role either and is forced to struggle manfully -- but utterly unconvincingly -- with a German accent. Fortunately, production values are exceptionally lush. If we rank the movie as a "B" feature, then it definitely emerges as superior movie fare.