As a bit of historically inaccuracy, the Eisenstein reference may not be all that important...but it does tutn what may or may not be a significant line of dialogue into mere name-dropping?...Of course we know better than to expect complete accuracy from a film like this...but still,I'd hate to think that a new generation of film students will come to believe that Murnau just stood by while half of his crew and cast were killed.....

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Online resources for film/TV studies may be found at ScreenSite
http://www.tcf.ua.edu/ScreenSite