James and Martin are in Germany, where they're teaming up with old friend Greg Koch, who is poised to open Stone Berlin, the first ever American craft brewery to land in Europe. The three craft beer pioneers join together again to celebrate one of the world's most renown beer cultures while rocking the establishment by brewing a beer that flies in the face of one of the country's most archaic laws.

James and Martin head to Grand Rapids, Michigan and take advantage of the icy, sub-zero temperatures to brew a potent, ice-concentrated Eisbock with craft beer giants Founders Brewing Company. And what better place to brew an Eisbock than 15 feet under a frozen lake.