A huge amount of data of a real megaquake was recorded for the first time by Japan's nationwide observation network when the March 11 earthquake and tsunami hit Japan. Analysis of this data revealed some previously unknown mechanisms that generate megaquakes and megatsunamis. Episode 1 explores the Earth's tectonic drama that took place underground and on the sea floor before and after the time of the quake -- precursory, irregular phenomena, chain reactions of earthquakes that happened in an unexpected pattern, and a series of sea floor movements that doubled the tsunami heights. This quake in Japan also triggered earthquakes in Mexico and elsewhere on the Pacific Rim. The tsunami reached as far as Chile and even the Antarctic. This first episode reveals the hitherto unknown mechanisms of a megaquake that literally can rock the world.