

4.556 minSeason 1 • Episode 4
LatestClaire finally loses herself in the hum as the outside world closes in on the group. One last group session ends in tragedy.
An English teacher begins to hear a low humming sound that no one else around her can hear.
Acting
Rebecca Hall's face does three things at once, always.
Sound
The hum itself: a character, a weapon, a question.
Direction
Tannahill turns domestic spaces into psychological battlegrounds.
Trivia, insights & behind the scenes
Rebecca Hall spent weeks with tinnitus sufferers to calibrate her physical responses; the hum frequency shifts slightly each episode.
The novel's cult was more explicitly supernatural—Tannahill stripped this back to force viewers into Claire's epistemic trap: you cannot know either.