Katla.... Allegory, metaphor or parable. What's quite clear in this remarkable series is that there's so much to digest in terms of morality, mortality playing a more dominant thought provoking role than the storiy itself. Like Stephen King's Pet Cemetery the temptation of having your loved one back despite negative consequences, you're wrestling with the irrational and common sense. This is such a fresh take on the idea ignoring the overbearing bleak environment , it's suffocating claustrophobic landscape which in a sense embellished the already dire lives of those affected in this drama.