Dark: parents' guide

Children are abducted and die in experiments, leaving bodies with scorched faces. A man hangs himself on screen, a man beats a young boy and leaves him for dead, others are shot or smothered, and a child dies in a time-travel accident.

Frequent strong language in the English dub and subtitles: Plugged In counted five to eight f-words and roughly 10 to 15 s-words per episode reviewed, plus ass, damn and hell.

Several sex scenes with nudity, including bare breasts and rear views, and one between teenage characters. An adulterous affair drives the plot, a central romance is later revealed to be between relatives, and a teen invents a rape claim against a classmate.

Teens smoke, share and sell marijuana, and a hunt for a missing friend's stash sets the story in motion. A grieving teen takes prescribed medication, and adults drink.

Relentlessly dark and disturbing: missing children, corpses, a lingering suicide scene, apocalyptic visions and grief-stricken families. The tangled time-loop plot adds a sense of hopelessness that can stay with viewers.