Marcus du Sautoy finds maths in unusual places.

Whatever you're planning to do tonight, cancel it! Because tonight at 9pm on BBC Two it's the first episode of Marcus du Sautoy's new series The Code. It's a three-part series about maths in the world around us, exploring anything from honeycombs to flocks of birds, nautilus shells to planetary motion.

And it's not just about sitting on the couch and marvelling — oh no! The Code is also a treasure hunt with clues being revealed in each episode, in a series of online games and on the blog. Getting all the clues right may lead you to a valuable prize hidden somewhere in the UK. The hunt has already started with a challenge to find pictures of primes in the real world.

Ian Short, the Open University academic consultant for the series (and Plus author), says: "The series is packed with mathematical curiosities. One of my favourites is a bubble dodecahedron, which you can already see here." And there are plenty more clips and game on the series website.

To warm up for the challenge you can also read Marcus du Sautoy's Plus articles:

• The music of the primes
• The prime number lottery
• Beckham in his prime number.

Happy code breaking!