Investigating a giant asteroid that may have been responsible for killing off the dinosaurs. Also: a NASA super gun; an underground river in Mexico.

Catastrophic geological events in Hawaii's history are examined.

A look at volcanoes, earthquakes and tsunamis in Japan.

Uranium used for the atomic bomb is sought in the Rocky Mountains.

Biologist Liz Bonnin and Geologist Martin Pepper investigate the world’s most dangerous volcano Mount Vesuvius only to discover that the three million people of Naples live in the shadow of another, much more deadly super volcano, called Campi Flegrei.

Evidence of the Ice Age is sought in North America.

The hosts visit Asia to study a destructive volcano in the premiere of this series featuring the study of geological events.

Examining whether Iceland's volcanoes could cause global problems in the future.