TV Guide Sky History 2 Sunday

A look at a perplexing and unusual metal sphere, just seven-hundredths of an inch across. Under extreme magnification, it shows two holes that have been precision drilled through it. Each one is just four times the width of a human hair

The Holy Sepulchre in Jerusalem is regarded by many as the most sacred Christian site in the world. Every year, the site welcomes more than one million pilgrims. Built on the site of the death and resurrection of Jesus of Nazareth, it has a unique atmosphere. Defied by time, wars and earthquakes, the Holy Sepulchre was rebuilt many times, and has transformed itself into an architectural labyrinth. Here, thanks to the use of new technologies, the Holy Sepulchre reveals its secrets as never before

The towering obelisks of ancient Egypt weigh hundreds of tons, though mainstream scholars identify them as monuments to the pharaohs. Ancient astronaut theorists suggest they may have served a technological purpose

The story of the prolonged development and the initially troubled operational history of the Boeing B29 Superfortress. It was an an American four-engined propeller-driven heavy bomber designed by Boeing and flown primarily by the United States during the Second World War and the Korean War

Alice Roberts and Matt Williams explore finds from archaeological digs across the north of Britain, and begin at the Ness of Brodgar in the Heart of Neolithic Orkney World Heritage Site, where they view a 5,000-year-old temple. The presenters witness the unearthing of a Roman altar in Maryport, Cumbria, examine discoveries from Flixton in North Yorkshire that are around 11,000 years old, and travel to a cemetery in Ardnamurchan in the Highlands. Plus, a Tudor-era feasting hall, and a hoard of Pictish treasures

Alice Roberts explores exciting archaeological finds across the east of Britain. A team unearths a mass grave, divers search the Thames for clues to a 17th-century tragedy and a metal detectorist makes the find of a lifetime. Presented by Alice Roberts

Alice Roberts explores archaeological finds across the North of Britain. A team discovers clues to Scotland's first kingdoms, metal detectorists unearth a hoard of Viking treasure and a new housing development reveals a graveyard of Iron Age warriors

Andy McGrath makes a startling discovery at the site of the Rendlesham UFO Incident, has an amusing encounter whilst investigating Suffolk's demon dog Black Shuck, gets up close and personal with Saxon treasure and burial rites, and sends psychic medium Simi to investigate one of Britain's most haunted inns

The towering obelisks of ancient Egypt weigh hundreds of tons, though mainstream scholars identify them as monuments to the pharaohs. Ancient astronaut theorists suggest they may have served a technological purpose

A look at what might happen if humans were to vanish from Earth, assessing which animals would be most likely to take over, whether LA's palm trees would spark a huge inferno, and what may become of New York

The towering obelisks of ancient Egypt weigh hundreds of tons, though mainstream scholars identify them as monuments to the pharaohs. Ancient astronaut theorists suggest they may have served a technological purpose

Unexpected things revealed by catastrophic disasters, featuring a mythical sculpture unearthed by an Indian tsunami, a 12th-century temple in quake-prone Mexico and a sunken ship in Utah's Great Salt Lake

Craig and space journalist Sarah Cruddas scrutinise an astonishing case that took place in November 2018 off the west coast of Ireland, in which multiple pilots saw bizarre lights through their cockpit windows. Ted Roe, Director of Research at the National Aviation Reporting Centre shares extraordinary insights into the sighting, while an ex-Nato air traffic controller - under the cover of anonymity - acts as a whistle-blower, spilling more secrets of the sky and the shocking lengths that governments are prepared to go to hide the truth