Time i s a concept which is so familiar, and yet recent discoveries have revealed it to be far stranger than we could have possibly imagined. In the final programme in the series, Brian explores the enigma of time - a phenomenon we take for granted but which is one of the biggest mysteries in the universe. He recalls highlights from his TV series that touch upon this conundrum.

The climate is changing faster than ever, which is why 'fix our climate' is one of the five goals of the Earthshot Prize. Prince William, Sir David Attenborough and Christiana Figueres highlight inspiring and often unexpected solutions to the challenge. In this film, we'll explain the scale of the problem posed by climate change and will introduce you to some amazing people already working on climate crisis. One of these three finalists will win the Earthshot Prize and get the platform and resources they need to scale their ground-breaking work. Nine more solutions for fixing our climate will receive the same support over the course of this decade.

Can new emission-free electric planes replace our polluting airliners and revolutionize personal transportation in our cities? The film takes a ride in some quiet, energy-efficient, prototypes that are vying for success as electric flight takes off.
The race is on to stop the climate emergency and we're seeing more and more people really paying attention to their carbon footprint. Aviation is a fast-growing offender, but is it too slow to respond. Could rapid progress in electric technology change the equation?

A strange light in the heavens. The star that signals the birth of Jesus. Is it faith, fable, or fact? The star of Bethlehem is hard to identify thousands of years later. Can we decode the secret of the star with the science of the universe? What was it? Where did it come from? And will it return?
Discover an explanation by various astronomers and religion historians of what the star of Bethlehem really was based on available evidence.

Follow the four civilians as they launch into space on a three-day trip orbiting Earth and reaching an altitude higher than that of the International Space Station. The SpaceX Dragon mission, dubbed Inspiration4, is making history as the first all-civilian mission to orbit.
In the first episode, preparations begin for the mission. The commander is Jared Isaacman, a billionaire entrepreneur who purchased the flight for all four passengers, and the second crew member is a 29-year-old cancer survivor, Hayley Arceneaux.

Humanity’s potential seems limitless. But could we become as powerful as God? Scientific breakthroughs grant our species seemingly divine abilities. Biologists tinkering with DNA are figuring out ways to grow new life forms, while neuroscientists try to create artificial consciousness. Statisticians around the world are using big data to predict the future and computer scientists have discovered a "God algorithm" that could solve any global problem in an instant. But to truly become God, we not only have to be all knowing, but all being. Quantum physicists are figuring out how to teleport matter at the speed of light!