“You don’t really know your parents, do you? What they were like as kids, or teenagers. You’re a family, but you don’t really know anything about each other.” Martha Nielsen says this to her brother Magnus as they lay in bed together, contemplating the disaster area their lives have become following the disappearance of their brother Mikkel. The most moving sequence in “Sic Mundus Creatus Est,” Dark‘s excellent sixth episode, demonstrates the truth in her words to devastating effect.