It's relatively easy to be a film buff these days. You have the IMDB and accessible greats like this one online for your perusal. In the old days before videos it wasn't so easy. You'd have to go to late night screenings to watch unusual films abd if you wanted information you had to buy film books - my shelves are full of them - I don't consult them anymore as there is no need but they're there as a reminder of the days when information wasn't so easily come by. Anyway here's an early expressionist classic - I expect you have seen it but Conrad Veidt is one of my favourite actors (he plays the sleepwalker Cesar).