Mankind has always looked at nature to solve problems, taking a cue from the solutions that biological systems have refined through natural selection. In this episode we look at a robotic plant that mimics the mechanics of plant roots, and dive underwater to see robots inspired by fish.

By the year 2050, three quarters of the world's population will live in urban areas. Looking at robotic systems being developed worldwide we can take a glimpse at the city life of the future. Private transportation with self-driving cars, our homes with automated systems - robots are in our future.

Inhospitable environments that would normally be unreachable become accessible thanks to a new class of robot - Robot Explorers. Robots can help us in difficult tasks like search and rescue operations. Is there any danger in letting machines handle so many tasks that used to belong to us?

In the future will we spend our leisure time with smart and sophisticated machines designed for fun - Entertainment Robots? Marvel at Mantis, a two ton insect and Tradinno, a giant fire-spitting dragon. Then take a seat and watch a mechanical actor and a robotic pianist perform.