Krypton is a planet on the brink of destruction. As its inhabitants struggle to survive, they must also face the reality that their world is coming to an end. This documentary explores the last days of Krypton, from the perspective of its citizens
From Wikipedia
Krypton is a chemical element; it has symbol Kr and atomic number 36. It is a colorless, odorless noble gas that occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. Krypton is chemically inert.