Mystery of Matter: Search For the Elements shows us not only what scientific explorers discovered but also how, revealing the creative process through the scientists' own words, and conveying their landmark discoveries through re-enactments shot with working replicas of their original lab equipment. This episode introduces viewers to some of history's most extraordinary scientists. Dmitri Mendeleev's Periodic Table brought order to the growing gaggle of elements. Marie Curie's groundbreaking research on radioactivity cracked open a window into the atom.