Horizon
Horizon is a documentary on BBC4. Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before. The popular program has been available since 2025. A total of 6 episodes have been broadcast, most recently in February 2026.
Last episode
Horizon
First transmitted in 1998, this is the story of four men who orbited Earth on board the ill-fated Mir space station.
Catching up on Horizon?
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Astronaut Tim Peake's video diary of the two years leading up to his arrival at the International Space Station in December 2015.
Documentary which follows the everyday people battling in the most extreme environment on earth to move Halley VI, a vital polar research station.
As more people than ever report struggling with their sleep, Michael Mosley uses the latest science to explore how this impacts our health and what can be done to improve our sleep.
Episodes 2025
Series exploring topical scientific issues. A look at the fledgling field of extraterrestrial meteorology, as technology allows astronomers to study other planets in new ways.
The remarkable story of how Hubble revealed the awe and wonder of our universe and how a team of daring astronauts risked their lives to keep it working.