Ancient Aliens examines 75 million years of the most credible alien evidence here on Earth, from the age of the dinosaurs, to ancient Egypt, to the skies over the western desert in the present day US.

Below each major city lies city upon city - each with its fascinating and unknown history. This series will reveal the technological marvels that allowed the construction of one city upon another - literally.

The team triggers a possible water trap in the cave and are forced to stop digging. Martin Flagg believes the Story Rock indicates a tunnel behind a waterfall and the team brings in a Navy diver to explore the plunge pools and search for an entrance.

Historical clues and the expertise of geologists reveal how powerful forces shaped the planet, going back 4.5 billion years to tell the story of how the earth was made. 

Below each major city lies city upon city - each with its fascinating and unknown history. This series will reveal the technological marvels that allowed the construction of one city upon another - literally.

An investigation into reports from India of encounters with a ferocious half-man, half-ape creature dubbed the monkey man.

Explore ancient myths, from the legendary people who inspired them to their real-life relevance today. Featured myths and the people behind them include: The Labyrinth of the Minotaur, Thor: God of Thunder; Beowulf; and Medusa.

James Nesbitt explores the human cost of six disasters that struck Britain in the past 60 years while examining the contexts of these tragedies and what changes followed in their wake.