In this episode we investigate earthquakes, the natural phenomenon caused by movements in the earth's crust. Various approaches and efforts in earthquake prediction are covered as well as discussion of earthquakes around the world. Faults, cracks in the earth's crust, where earthquakes happen frequently are shown as well as footage from earthquakes around the world. The forces exerted by earthquakes and how man is powerless to stop them. The famous Californian San Andreas Fault is covered in detail as well as new methods that are hoped will enable scientist to for tell a quake before it occurs.