Stephen Hawking and his team investigate how reality is being increasingly stretched as people become less dependent on the physical world and more involved with the virtual electronic world. In this episode, a remarkable 3D virtual training program for the military is investigated, a new system is tested that can map places inaccessible to GPS and Sat Nav, bio-printing, where designs created on computers are turned into three dimensional living tissues is examined and a new wave of sci-fi technologically is revealed; a computer that can read people's minds.

Aarathi Prasad road-tests Boston Dynamics' incredible animal-inspired robots.

Experts examine how scientists are fighting for our survival by battling the world's biggest killer diseases.

Stephen Hawking and his team investigate how science is on the cusp of making urban living not just a richer experience, but more fun too.

Stephen Hawking and his team investigate how breakthroughs in technology are being applied to human beings, not only for more effective repairs and replacement body parts, but also for upgrading the brain.