Did intelligent beings from outer space visit Earth thousands of years ago? From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate.

The story of how a fatherless young soldier full of personal ambition becomes a leader of men willing to sacrifice all for the common cause. How a once-loyal British subject rises to battle an empire in a liberty-or-death campaign to forge a new nation. And then how, at the zenith of his power, the victorious general voluntarily steps down, becoming what King George III would call “the greatest man in the world.”

The true story of America's iconic 16th president as told by weaving together both scripted dramatizations of important moments in his life and commentary by authoritative historians and public figures.

Dr Alice Roberts follows a year of British archaeology, joining up the results of digs and investigations the length of the country.

Follow presenter Rick Edwards as he ventures inside some of the UK’s most spectacular and endangered castles. From crumbling medieval towers to collapsing royal chambers, engineers and historians battle to stabilise these epic structures before they're lost forever.

The 4077th Mobile Army Surgical Hospital is stuck in the middle of the Korean war. With little help from the circumstances they find themselves in, they are forced to make their own fun. Fond of practical jokes and revenge, the doctors, nurses, administrators, and soldiers often find ways of making wartime life bearable.

A re-imagining of the 1980s miniseries about the world's first encounter with an alien race in which the aliens call themselves The Visitors, and have a seemingly friendly agenda that may or may not be a cover for something more malevolent.

In the near future, planet Earth is permanently altered following the sudden—and tumultuous—arrival of seven unique alien races. In the boom-town of Defiance, the newly-formed civilization of humans and aliens must learn to co-exist peacefully.

In the aftermath of a hurricane the Florida Park Ranger and his family deal with strange occurrences, including luminescent creatures in the water. People in the town start to act different, who can you trust?

When astronomers detect a transmission from another galaxy, it is definitive proof of intelligent extra-terrestrial life. The world’s population waits for further contact with bated breath. They do not have to wait long. Within days, mankind is all but wiped out by a devastating attack; pockets of humanity are left in an eerily deserted world. As aliens hunt and kill those left alive, the survivors ask a burning question – who are these attackers and why are they hell-bent on our destruction?

A ten-episode docuseries that uncovers the complexities of murder cases where the victim's body is found in a body of water. The series explores how factors like tidal movement, trace evidence loss, and the decomposition of the body create unique forensic challenges for investigators. Each episode focuses on a different case, showcasing how investigators were able to overcome these obstacles to solve the crime.

Olympic medalists join the police force through a special recruitment program, trading medals for badges as they tackle violent crimes and injustices with their athletic skills.

As a serial killer targets couples and strikes terror in Italy, authorities explore a case from 1968 that may be key to finding The Monster of Florence.

When a headmaster's wife goes missing, suspicion falls on him. Is he hiding something, or is there more to this case than meets the eye?

John Hughes joined MI5 during the war on terror and was at the forefront of averting the biggest terrorist plots on UK soil. Now in his mid 40s and married with two children he’s struggling to adapt to the new MI5, where threats to national security have changed and he’s forced to adapt to the values of a progressive work environment.