In April 1945, American soldiers blasted a hole in the wall of an underground mine in Germany. Inside: neatly stacked canvas bags full of looted gold worth an incredible $9 billion today, but amazingly just a fraction of the gold stolen by the Nazis during the war. In this episode, the team investigates why gold was so vital to the Nazis, the brutal methods they used to get it, and where some still missing gold may be hidden today.