Deanna Troi's psychic assault: Troi is psychically contaminated by the recurring music tied to Kevin's recreations and must be protected and healed — a personal, supernatural/psychic injury with operational consequences.

Counselor Troi is found sleepless and unraveling, mentally trapped by an intrusive, perfectly repeated melody she cannot identify. Picard pierces her professional defenses, and Troi admits the song began while …

Counselor Deanna Troi erupts into near-hysteria as an intrusive, hallucinatory music invades her mind. Doctor Beverly Crusher and two medical assistants attempt bedside interventions — calming, a sedative injection, and …

Kevin quietly lifts the relentless waltz from Troi's mind, leaving her sleeping and finally at peace, then concedes the truth when Picard arrives. He reveals he is a Douwd — …