
The Capital Threat: What would happen if all humans vanished? Would LA's palm trees spark a huge inferno? What would become of New York? And which animals would take control from man?

Ticking Time Bombs: Hidden dangers once held at bay by humans erupt with force, from everyday objects ready to explode to chemical plants and locust plagues. (S3, ep 8)

The Bodies Left Behind: What if every human on Earth disappeared? Discover what would happen to the world we have created, including our animals, buildings, landscape and bodies.

Outbreak: What would happen to Earth if all humans vanished? Outbreak examines the possibility of escaped animals, invasive vines and a deadly virus taking over control from humans.

The Capital Threat: What would happen if all humans vanished? Would LA's palm trees spark a huge inferno? What would become of New York? And which animals would take control from man?

Heavy Metal: If people disappeared from Earth, what would happen to metallic objects? Would bridges and buildings collapse? And what would become of the US's secret stash of gold?

The Invaders: In a world void of people, pythons begin to challenge alligators for control of the Everglades. Elsewhere, Shanghai sinks under the weight of its empty skyscrapers.