Science Channel HD

Experts examine declassified documents to uncover the true story behind the worst nuclear disaster in history.

Don Wildman explores the 1906 San Francisco earthquake that claimed approximately 3,000 lives; he also gains insight into when and where the next big earthquake may strike.

The clifftop ruins of Tintagel Castle are shrouded in a tumultuous history and believed to be the birthplace of King Arthur; experts use cutting-edge tech to unlock the secrets of this ancient structure and reveal the truth behind a legendary ruler.

The sacred city of Nippur and the world's only ziggurat contain elusive mysteries to the ancient Sumerian people; now, archaeologists armed with pioneering tech are on a quest to reveal the secrets behind the earliest known civilization in history.

The downfall of the powerful Maya city of Palenque continues to mystify archaeologists today; now, investigators gain rare access to explore lost tombs to reveal the truth behind this legendary city and the mystery behind its enigmatic queens.

Astronaut Leroy Chiao's spacewalk is interrupted by bright lights flying past; a flying saucer is photographed from the Apollo.

Cosmonauts are trapped in a capsule in a frozen lake; a NASA scientist investigates the Hindenburg; the full moon affects experiments.

Apollo 12 astronauts bring back something alive from the moon; NASA tracks an asteroid heading towards Earth but make an incredible discovery.

The center of the Milky Way is home to strange and deadly phenomena that is difficult to understand; with the help of science, experts reveal how the black hole, the galaxy's core, shapes life on Earth.

Time travel may be more possible now than ever imagined, and today, cutting-edge technology and the latest research into black holes and wormholes is helping experts get much closer to discovering how to travel through time.

Templar fact and fiction have become blurred by their depictions in book and on film. This program presents a very different picture that challenges head on the orthodox beliefs about an order that angered much of Europe - particularly France.

Mary Magdalene, a key figure in Christianity, traveled with Jesus and is said to have witnessed his crucifixion and resurrection.

Mystery still surrounds how fascist dictator Benito Mussolini met his end, before being hanged.

The extraordinary story of the Bulgarian secret department called Service 7, a force that operated in 9 countries.

The Vatican Secret Archives is a treasure trove of history that is shrouded in secrecy; Jamie Theakston heads to Rome in a bid to gain access.

Jamie Theakston investigates Johann Reichhart, a German executioner who killed approximately 3,000 people during World War II.

Experts uncover a mysteriously abandoned underground complex that may have hid something very dark.

When the Nazis took Ksiaz Castle in 1941, it wasn't for the view, and they got to work turning it into a fortress; secret staircases and elevators were built, while underneath, a vast network of tunnels was taking form.

A labyrinth of tunnels carved deep in the Polish mountains leads to the largest underground Nazi weapons development complex ever discovered.

As the Nazis plot the beginning of their empire, Heinrich Himmler transforms the ruins of a German castle into a mysterious Nazi complex.

A medieval castle-like complex in the remote mountains of Germany contains dark secrets to the Nazi's plan for world domination; experts investigate and uncover a nefarious training facility designed to groom elite Nazi personnel.

As the Nazis embark on their dominate rise to power, a massive construction project secretly begins across Eastern Germany; using the latest tech, experts uncover an elaborate network of underground tunnels and bunkers with frightening ambitions.

The skeletal remains of strange structures are clues to a mysterious research installation secretly built by the Nazis in Western Poland; experts investigate and uncover top-secret military fuel development with a catastrophic purpose.

A medieval castle-like complex in the remote mountains of Germany contains dark secrets to the Nazi's plan for world domination; experts investigate and uncover a nefarious training facility designed to groom elite Nazi personnel.