We're not going to miss a rare opportunity to see Stalker (1979) by Andrei Tarkovsky (director of the original Solaris), screening tonight at the SF Art Institute (800 Chestnut St.) for free. This influential Russian film has many elements associated with Russian literature - epic length, existential ennui, depressing locales. A brief plot synopsis: Two disenchanted intellectuals wish to explore the Zone, a mysterious region at the center of which a room, said to offer......