A teenager desperate to pass his Biology final is visited in the night Christmas Carol-style, by the spirits of some of the greatest scientists in history.

Richard Hammond presents a geological journey to the bottom of the ocean and the centre of the Earth, revealing how the inner workings of the planet affect life on the surface.

Get a taste of the most beloved bites on American streets and, along the way, discover the heart, soul and wildly diverse real people behind the food.

Amol Rajan talks to a true game changer: Billie Jean King.