Watch Chernobyl: The Lost Tapes Full Movie Free Online 123Movies. Thirty-six years after the Chernobyl nuclear reactor exploded in Soviet Ukraine, newly uncovered archival footage and recorded interviews with those who were present paint an emotional and gripping portrait of the extent and gravity of the disaster and the lengths to which the Soviet government went to cover up the incident, including the soldiers sent in to “liquidate” the damage. Chernobyl: The Lost Tapes is the full, unvarnished true story of what happened in one of the least understood tragedies of the twentieth century.