TV Guide for Yesterday Friday 10 in Sky History 2

For years, people have claimed to have had direct, personal contact with aliens. The team tracks down some of those who claim to have had such contact.

Discover what would happen to priceless artefacts such as the Mona Lisa, the Declaration of Independence and the Liberty Bell if humans were no longer around.

With no humans around, discover the fate of Las Vegas and Atlantic City, where the ocean would tear apart casinos and a new rat pack would take over.

Discover the fate of mankind's machinery of war in a world with no people, in which Pearl Harbor comes under renewed attacks, and snow causes urban avalanches.

Mike and Avery try to get an auctioneer to help them downsize their collections but Avery scares him off.

Count down the world's top ten pyramid sites, from hidden structures in Peru to the famous landmarks of Giza in Egypt.

Count down the top 10 mysterious devices found around the world, from strange discs found in a cave in China to an ancient Greek computer.

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.

Thanks to the heroic acts of sailors, America scored a stunning win in the battle of Guadalcanal, loosening Japan's mighty grip on the Pacific.

The World War II killings carried out by the Nazis on Alderney represent the worst mass murder in British history - yet no one has been brought to justice. (2 of.

Count down the world's top ten pyramid sites, from hidden structures in Peru to the famous landmarks of Giza in Egypt.

Count down the top 10 mysterious devices found around the world, from strange discs found in a cave in China to an ancient Greek computer.

Roman emperor Titus plans 100 days of games to commemorate the Colosseum's completion in 80 AD, including a fight to the death between Priscus and Verus.

Emperor Domitian tasks master builder Haterius with constructing a labyrinth underneath the Colosseum floor.

Enslaved by the Romans, Carpophorus gets trained to fight beasts in the Colosseum for the public's amusement.

Emperor Trajan throws his great games of AD 107 and the crowd is treated to the rare spectacle of female gladiators.

Ignatius refuses to pledge his allegiance to the emperor and is forced to travel 1,800 miles to the Colosseum, where his final punishment awaits.

Nubian pyramids reveal the rise of female power in Ancient Kush, while satellite images uncover secrets of an ancient Puebloan site in New Mexico.

This episode chronicles several close encounters with alien abductees who have been held captive, probed, examined and had objects implanted in their bodies.

After the attack on Pearl Harbor, the Japanese army celebrated its victory. Four months later, the Battle of the Coral Sea shakes their confidence.

What is it about this barren land that is attracting alien attention? Is it the sensation of otherworldliness making it feel like home.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

Count down the world's top ten pyramid sites, from hidden structures in Peru to the famous landmarks of Giza in Egypt.

This episode chronicles several close encounters with alien abductees who have been held captive, probed, examined and had objects implanted in their bodies.

Veterans and historians tell the story of the Thai-Burma railway and the countless prisoners of war and slave labourers who lost their lives building it.

From the trench to the home front hospital, a medical historian retraces the train journey made by wounded soldiers during World War I.