On a good day, you just can't beat living here on earth. And what looms larger in our lives than the sun? It's the basis of our calendar, the centre of our solar system and makes it what it is - a place where the third planet can support life complicated enough to ask how it is that the third planet can support life! In this first episode we start right at the beginning - the beginning of the universe, and we'll understand how our sun came to be, how it works, how it's put together and how it warms, sustains - and threatens - the planet earth.