The Man Who Ended History: A Documentary

A scientific invention makes it possible to virtually travel back in time and witness historical events. It is only possible to witness it once from the same perspective, because the process eats up the record. The inventor and her husband draw attention to the atrocities of Unit 731 during WWII. They hope that eyewitnesses will shut down denialists. But Chinese versus Japanese, and U.S. politics start their own games.