The Earth is built to last. It is 4.5 billion years old. It has taken more devastating asteroid hits in its lifetime than you've had hot dinners, and it still orbits happily around the sun. But physics is a curious thing and it can harness devastating power -- enough even to destroy the world. Naked Science will analyze antimatter, black holes and even more amazing means of destruction -- and the havoc they could wreak on a planet. So strap in, buckle up, and enjoy the ride to doomsday.