Depressed? Hearing voices? Been on a sudden spending spree? Suffering delusions? Perhaps you need to visit a mental hospital. After all, one in eight women and one in 12 men need to go at least once in their lives. "Horizon" eavesdrops on consultations between psychiatrists and patients in Friern Hospital to try to understand the extraordinary and puzzling inner worlds of the insane. The programme was made with the full consent of the patients involved, their next-of-kin, and their consultant psychiatrists.