Possession

This challenging and highly unusual drama stars Isabelle Adjani as a young woman who forsakes her husband (Sam Neill) and her lover (Heinz Bennent) for a bizarre, tentacled creature that she keeps in a run-down Berlin apartment. In the beginning, her husband knows nothing about the monster and sincerely believes that his wife is insane. He has her tailed by private detectives, whom she kills and feeds to the creature. Still unaware of what has happened, the husband contends with the reserved and inadvertently seductive presence of his wife's look-alike (also played by Adjani), a schoolteacher who frequently comes to tutor his son while his wife is away. Though tempted by her quiet goodness and beauty, he is still passionately in love with his wife and even after he finds out about the murders he stays by her side and helps her conceal her crimes.