TimeWhat if we could travel not just through space, but through time itself? If you could travel through time, would you change the past or the future? What if you found it couldn't be changed? What price does the time traveler - and the people they are closest to - pay? This is a journey from H. G. Wells' The Time Machine through ideas like The Grandfather Paradox and The Butterfly Effect to the professional time traveler that is the ever popular Doctor Who. What would be the physical and emotional cost to the time traveler? And what if someone from the future tried to travel back in time to warn us? Would we believe them? From the apocalyptic tones of 12 Monkeys to the drama of Quantum Leap and the comedy of Groundhog Day, time travel is a subject that has been irresistible to the creators of every type of science fiction.