歷史上的聰明人都指出時光旅行是可行的，但如果有跡象指出，其實人類早就進行過時光旅行了呢？有人相信如果時光旅行的可能性是存在的，那就表示來自未來的旅人可能早就已經來到現代。本節目探討時光旅行背後的各種證據、疑問、陰謀，並讓你看看第一線的目擊者們。
The greatest minds in history have pointed to the theoretical possibility of time travel, but what if there were signs that human beings have already traveled through time? There are those who believe that if time travel capability will ever be invented, future time travelers could already be here. This special explores the evidence, questions, conspiracies, and eyewitness accounts surrounding the theories of time travel that have captivated the world.
