All-time favourite director, and Stalker is one of my/possibly no 1 favourite film(s). It’s possibly the most thrilling film where not much actually happens.
It also probably killed him, his wife/assistant director and the lead actor. The scene with the foaming water got messed up by the film lab, and they had to return to Estonia to re-film it. The usual casual Soviet attitude to pollution and environmental disaster meant that no-one had bothered to tell the film crew that the water was full of toxic waste, and the three of them involved with the film died young of the same kind cancer a few years later, and the sound editor is convinced the chemical waste poisoned them.