Le 11 mars 2011, un séisme de très forte magnitude survient au large des côtes nord-est du Japon. Il déclenche un tsunami dévastateur qui touche notamment la centrale atomique de Fukushima. De nombreux et graves accidents, dont la fusion du réacteur, s'y produisent dans les heures qui suivent. Des simulations scientifiques et témoignages d'ingénieurs présents dans la salle de contrôle au moment du drame permettent de retracer, et comprendre, cet enchaînement d'événements aux lourdes conséquences

It's the process that powers the Sun, and scientists know that if they could just make nuclear fusion happen here on Earth they could solve all the world's energy problems. Billions of dollars have been spent on trying to make it happen, but now an American scientist claims to have created nuclear fusion simply by bombarding a flask of liquid with sound waves. Many scientists refuse to believe his claims, so Horizon has assembled a team to replicate the experiment. This film reveals the team's findings

Professor Brian Cox takes a global journey in search of the energy source of the future. Called nuclear fusion, it is the process that fuels the sun and every other star in the universe. Yet despite over five decades of effort, scientists have been unable to get even a single watt of fusion electricity onto the grid.

In 1992 the nuclear industry celebrated its 50th anniversary and the report on the accident at Chernobyl claimed there was no evidence of long term health effects. Within months, a team of western scientists presented a very different picture with evidence of an epidemic of thyroid cancers in local children.