S2E80 - The Birth of the Third Heartbeat

In the nursery on Hawthorne Street, Luna feels a cold hand pressing from inside her chest as the child speaks through her own throat. Disoriented and struggling to breathe, she finds a cassette labeled 'The Birth of the Third Heartbeat' and plays a recording of her mother's voice describing a ritual performed in the Hollow. The heartbeat splits into two—one in her chest, one outside—and Luna follows the sound to a mirror that shows her pregnant with herself. As she touches the glass, a door opens into a room where a woman is giving birth, and Luna real...