When inventor John Logie Baird's pioneering work came to fruition in November 1936, today's multi-channel satellite era was light years away. This Horizon programme asks whether the latest "improvements" have driven television into a cul-de-sac, and if there are any modern-day innovators to guide the medium into the 21st century.
Horizon is an ongoing and long-running British documentary television series on BBC that covers science and philosophy.