Alligators on golf courses, geckos in hotels, chameleons in the garden and pampered pet pythons - reptiles are invading our space! So what will the future role for these living cousins of the dinosaurs be? Will reptiles give us better biotechnology and medicines? Or a 'Jurassic Park'?

The second programme focuses on the amazing natural technology that makes reptiles such a successful group. Are reptiles the bio-technology wizards of the animal world? If you count sprinting on water, shooting blood from the eyes, spitting poison at their enemies, navigating by magnetic fields, converting ribs into a hang-glider, or communicating emotions in colour then, yes, they are!

The extinction of the dinosaurs left a power vacuum. Enter the dragons: powerful modern reptiles which still dominate large areas of our planet. Ruling Reptiles goes in search of the modern reptiles that have inherited the dominant role.