Capsule by Jonathan Rosenbaum
From the Chicago Reader

Louis Feuillade's extraordinary ten-part silent serial of 1916, running just under eight hours, is one of the supreme delights of film--an account of the exploits of an all-powerful group of criminals called the Vampire Gang, headed by the infamous Irma Vep (Musidora), whose name is an anagram for "vampire." Filmed mainly in Paris locations, Feuillade's masterpiece combines documentary with fantasy to create a dense world of multiple disguises, secret passageways, poison rings, and evil master plots that assumes an awesome cumulative power: the everyday world of the French bourgeoisie, personified by the hapless sleuth hero, during the height of World War I is imbued with an unseen terror that no amount of virtuous detection can ever efface entirely. (Significantly, as in many of Feuillade's serials prior to Judex, the villains are a good deal more fascinating than the relatively square hero, though a comic undertaker and the leader of a rival gang are periodically on hand to help him out.) One of the most prolific directors who ever lived, Feuillade is arguably a good deal more entertaining than Griffith, and unquestionably much more modern: his mastery of deep-focus mise en scene is astonishing, and its influence on Fritz Lang as well as Luis Buñuel and other surrealists remains one of his major legacies.