The teacher (Helen)
There are a lot of things in this movie that are confusing. But perhaps the most confusing thing to me was the teacher (Helen) - why did she look identical to the wife (Anna)? What was the meaning of that? I have not heard the director's commentary or read any explanations, so I can come up with my own theory. We saw that the "monster" developed into a man looking identical to the husband (Mark). Perhaps the teacher had developed from a similar monster some time ago. I'm not exactly sure what would be the significance of all that, but it seems logical to assume that if one of the doppelgängers originated in the monster, then the other one could have the same origin. By the end of the movie, both of the original versions are dead and the copies seem destined to take over their lives. The sounds of bombs falling over end credits could symbolize some sort of apocalypse.
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