S1, E6: What dangerous materials are held in an abandoned American Cold War military base in the Northern Arctic? Did a saboteur shut down the US Navy's classified Sea Lab? In WW2, who were the mysterious and deadly Soviet pilots called "Night Witches" and why did they terrify the Nazis? And what is the true history behind a bizarre secret weapon of WW2? Veterans Rudy Reyes and Ronnie Adkins break down the evidence behind the most mysterious photos, films, and recordings in battlefield history.