Watch the whole film through a series of links on Youtube:
This film was later re made into a new story based in medieval times, which provides the film with the usual B-Movie slapstick horror scenes. Personally this ruined a well made, well thought out movie in which both acting and production reigned supreme.
The interesting thing to note about this film is that the Werewolf is the Sister to one of the other main characters, yet as she has lost her mind she wants to feed on everyone she knows that comes in her path. This can relate to cannibalism, even though the character is no longer human in form.