Andrei Tarkovsky is the most famous Russian director, often called a genius during his lifetime. He made relatively few films, but each has become a classic of world cinema, including “Andrei Rublev,” “Solaris,” “Mirror,” and “Stalker.” His films seem to be crafted from air, water, fire, deep emotions, and even his own dreams. This art is profoundly sincere and confessional, but what about the creator behind it? What was this god-like figure like, living a mortal life filled with weaknesses, fears, and doubts?