Fritz Lang’s “Die Nibelungen” is a passionate retelling of Nordic legend, invested with all the resources of the colossal Ufa Studios. Scripted by Lang and his wife Thea von Harbou (who later collaborated on “Metropolis”), and originally released as two separate features, the saga begins by constructing an enchanted kingdom populated by dragons, magical trolls, and heroic figures defined by rigid codes of honor. New restoration by the Friedrich-Wilhelm-Murnau-Stiftung -. includes one intermission.