The UnXplained S06E02 - The Time Travelers

For thousands of years, humanity has been fascinated by the notion that man will one day travel through time. But what if time travel has already taken place? Some of the world's greatest scientists firmly believe that this mind-bending feat is theoretically possible. So, is it really too far-fetched to believe that certain people may have managed to journey through the fabric of time, whether by design... or perhaps, by accident?