S2·E3 Crypt Of Civilization

In the post-apocalyptic world, man's mysterious relics meet very different fates, including those in a site in the U.S. called the "Crypt of Civilization". Other crypts, safes, and time capsules are exposed to new threats. An abandoned Mental Hospital in Connecticut offers clues regarding man's ability to preserve records. Can the military training given to Marine Corps dogs help them succeed in the wild?