Some of science fiction's greatest creative pioneers tell the story of sci-fi in this stunning definitive series spanning all its forms, from time travel to artificial intelligence, from space exploration to alien encounters. This thoroughly engaging series features filmmakers, writers, actors, and graphic artists whose obsession and imagination has taken them into the unknown - and whose creations have captivated audiences around the globe. Having explored the future, the past, parallel universes and galaxies far, far away, contributors - including actors William Shatner, Nichelle Nichols, Rutger Hauer, Zoe Saldana, Nathan Fillion, Richard Dreyfuss, David Tennant, Peter Weller, Christopher Lloyd, Keir Dullea and Edward James Olmos; filmmakers John Carpenter, Douglas Trumbull, Paul Verhoeven, John Landis and Doctor Who writer and executive producer Steven Moffat; authors Ursula K. Le Guin, Neil Gaiman and William Gibson - report back on their experiences. With the help of Professors Brian Cox and Stephen Hawking, the series also explores the key scientific concepts underpinning sci-fi stories.