What do you think the world is going to be like in the future? It's a question that's been under investigation by science fiction writers for a long time. We've seen guesses range from finding friendship with alien life, to suggestions our earth will one day be uninhabitable. The series closely examines scientific extremes we may one day inevitably reach. Professor Stephen Hawking hosts each episode off camera, introducing the questions that society may inevitably have to ask. Never before seen episodes include Little Brother and Watchbird.