This episode unlocks the secrets of one of the most sophisticated and mysterious civilisations the world has ever known.

The ancient city of Petra, a city carved from desert rock, has baffled experts for decades. Now, new technologies resurrect the city and reveal why the spectacular civilisation was suddenly abandoned.

New evidence uncovers the ancient mysteries behind the iconic Colosseum. Archaeologists uncover the secret lives of the gladiators and make new discoveries that help explain the rise and sudden fall of the Roman Empire.

The Terracotta Army is one of China's greatest treasures, but there are still dark secrets surrounding this super-tomb. Newly discovered artefacts reveal the soldiers' supernatural enemy, and human remains point to ancient China's violent origins.

The 15th-century city of Machu Picchu is one of the greatest mysteries in archaeology. Scientists do not know why this city in the clouds was built, but investigations into secret Inca codes and deformed skeletons might finally reveal its ultimate mystery.

The Taj Mahal is one of the world's most beautiful monuments, but new investigations reveal its dark secrets. Scientists are uncovering codes that tell a shocking story of power and betrayal, challenging everything we thought we knew about the Taj Mahal.

Stonehenge is the ancient world's greatest wonder and biggest mystery. Now, new discoveries are revealing its deepest and darkest secrets, showing how ancient magic, bizarre rituals, and brutal murder built this strange monument.

A castle in Scotland could be the home of King Arthur's legendary Round Table. Scientists have made a gruesome discovery at this mysterious site: a disfigured skeleton that could reveal the castle's bloody secrets and rewrite the history books.

The series finale reveals the secrets of the ancient Chinese engineers and unravels the mysteries of the most ambitious construction in the history of mankind.

New technologies reveal the startling truth behind the largest temple ever built, Angkor Wat. Accompany experts as they uncover how this colossal structure was constructed and why one of the largest cities in the world was suddenly abandoned.

Giant pyramids at a strange site in Mexico are revealing the bloody secrets of a mysterious civilisation that vanished 1400 years ago. Little is known about this lost culture, but new discoveries are uncovering shocking evidence of human sacrifice.

Recent forensic findings uncover the astonishing secrets of the world's most iconic monument, the great Sphinx at Giza. Join the extraordinary investigation as it reveals which pharaoh commissioned this colossal statue and why it was never finished.

New discoveries explore the dark secrets of Tutankhamun's tomb. Archaeologists are finally finding answers to its ancient riddles, showing how his untimely death, his calamitous burial, and an act of God made a minor king the most famous of them all. Series also known as Unearthed.

The Acropolis has overlooked Athens for thousands of years. Now scientists aim to reveal how it was built, what it looked like, and how it's still standing. Series also known as Unearthed.

A medieval engineering marvel may house the remains of the Bible's Three Magi. Scientists and experts delve into the mysteries of this religious site.

In Mexico, the lost city of Chichen Itza holds ancient secrets of a strange civilisation. How was it was built and how did human sacrifice shape it?

While most people think the Blitz originated in World War II, the truth is that the first Blitz happened during World War I. Bombs were delivered from giant airships designed by Count Ferdinand von Zeppelin, who got his inspiration when he was a Germany Army observer in the US during the Civil War and rode in a hot air balloon for the first time. These lighter than air superstructures, two times longer than the Statue of Liberty is high, measured their flights in hundreds of miles when pioneering aviators measured their success in hundreds of yards.

In World War I the Germans, ignoring international treaties they signed, were first to weaponise a chemical. In this case it was chlorine - a highly toxic ingredient used in the manufacture of chemical dyes of which they had a huge supply. Their action unleashed an escalation of poison gas weapons as both sides developed different chemicals and more effective counter measures. Their use of culminated in a bold British plan that unfolded beneath the battlefield at Messine Ridge. British mining and explosive experts planted 450 tonns of high explosive hidden in a network of tunnels under Messine ridge. When ignited, they created the biggest land mine in history - killing 10,000 German soldiers. The explosion rattled windows at 10 Downing Street, 140 miles away and registered as an earthquake in Switzerland.

From February 1917, Imperial Russia was plunged into nine months of popular and spontaneous revolt. The end of this revolution was a coup that changed the course of history and profoundly altered the future of civilisation and it was all chronicled by a journalist stationed in Petrograd.

In the 1980s, one of the most extraordinary discoveries of the 20th century was made - the personal diary of none other than Adolf Hitler. It caused a sensation. The German magazine De Stern picked up the serialisation rights for a cool $6 million in their own country; the Sunday Times grabbed them eagerly in the UK. A pity then that they turned out to be the work of notorious Konrad Kujua, a Stuttgart forger with an uncanny ability to copy the Fuhrer's handwriting. Cue copious amounts of egg on face. This is the whole story of the hoax, the people behind it and the way it was exposed. In addition, it provides a chilling insight into the burgeoning market for Nazi memorabilia at the time and how men like Kujua went to extraordinary lengths to satisfy the worldwide demand.

In World War I, tanks were the first armoured fighting machine to be used on the battlefield. These "land ships", as they were first called, were championed by Head of the British Admiralty Winston Churchill. Adapted from an American tractor with caterpillar tracks, the machine was designed in secrecy to break through the heavily fortified trenches and offer protection for troops that were being mowed down by heavy artillery. Though a massive failure in their first combat in the Battle of the Somme- they broke down and got stuck in the mud-British government propaganda reversed the story and paved the way for thousands of tanks to be built and become a decisive weapon in the war.

The Playroom is a very special place for stories, adventures and discovering as Chris, Pui and their friends explore everyday themes that relate to young children's lives. Anything can become the start of an adventure! Join in the fun!

To be a Hollywood great is to fly too close to the sun, to embody the dreams of millions while placing your fate in their hearts. This program celebrates the lives of those who soared the highest.

The Playroom is a very special place for stories, adventures and discovering. Chris, Pui and their friends explore everyday themes where anything can become the start of an adventure!

Hidden away in the heart of the Salisbury Plain in Wiltshire is the abandoned shell of Imber. The 1000-year-old village was once a vibrant community before a series of extraordinary events.

The Playroom is a very special place for stories, adventures and discovering as Chris, Pui and their friends explore everyday themes that relate to young children's lives. Anything can become the start of an adventure! Join in the fun!

One of the brightest, most tragic movie stars of Hollywood's Golden Era, Judy Garland was a much-loved character whose warmth and spirit, along with her rich and exuberant voice, kept theatre-goers entertained with an array of delightful musicals. Judy shot immediately to stardom with The Wizard of Oz (1939), in which she portrayed Dorothy. Her poignant performance and sweet delivery of her signature song, Over The Rainbow, earned Judy a special juvenile Oscar statuette on February 29, 1940, for Best Performance by a Juvenile Actor.

In 2011, though ill prepared, Kim Jong-un inherited the leadership of North Korea and through the use of propaganda and brute force, he has cemented his place on the world stage. Now, the lid is lifted on one of the most elusive leaders in the world.

Veteran performer, Noni Hazlehurst, goes in search of the secrets her parents held so tightly. This journey will be a revelation to Noni. She'll come to understand the impact of war on her immediate family, and why she knows so little about her world-renowned performing ancestors.

Described by Orson Wells as maybe the greatest actor to appear in front of a camera, James Cagney was a hit right across the globe. One of Hollywood's preeminent male stars of all time, and the cinema's quintessential "tough guy", James Cagney was also an accomplished, if rather stiff, hoofer and easily played light comedy.

Princess Elizabeth grew up in the Piccadilly home of her parents, the Duke and Duchess of York. The Abdication of her uncle, Edward VIII, in 1936 appeared to be a catastrophe to her family, catapulting her nervous father onto the throne as King George VI. Elizabeth became heir to the throne aged 10, and seemed to be a shy girl with a limited education. Queen Elizabeth II is the longest reigning monarch in British history, but she was neither born nor educated to take on that role. At the age of 10 her life was turned upside down, when her uncle Edward VIII abdicated, catapulting her into the position of heir to the greatest empire the world had ever seen. At the age of 21, she broadcast to the people of Britain and the Commonwealth that her whole life would be devoted to service - a pledge she renewed 60 years later at her diamond jubilee. As monarch she has appointed 13 prime ministers, from Sir Winston Churchill to Teresa May, and despite the best efforts of some politicians she has kept above the political fray. Her greatest achievement has been to transform the British Empire into the new Commonwealth of diverse and independent nations. During her reign she has experienced family tragedy and triumph, often having to choose between supporting her family and doing her duty as monarch. This eight-part series interviews the Queen's prime ministers, members of the royal household and closest friends, to build a uniquely personal picture of Elizabeth, the woman, the mother, the Queen.

There is no doubt Vivien Leigh is a screen icon who brought to life some of the most famous characters ever to grace the silver screen. A relatively unknown British actress, Vivien won the Best Actress Oscar for her first Hollywood movie playing the character of Southern belle Scarlett O'Hara in Gone with the Wind.

To be a Hollywood great is to fly too close to the sun, to embody the dreams of millions while placing your fate in their hearts. This series celebrates the lives of those who soared the highest. From Marlon Brando to Elizabeth Taylor, we uncover what drove them and why the world loved them. Contributions from contemporary commentators and current Hollywood glitterati will bring each icon's legacy up to date as we relive their most magical motion picture moments and explore the personalities behind the names.

Actor, singer and performer Bing Crosby was the definitive all-round entertainer. His singing style ushered in a whole new era of styles which we now call crooners. Radio, television, film - Crosby adapted to whatever was thrown at him at the time. One of the bestselling recording artists of the 20th century, Bing was loved, and admired across the globe. Representing wholesomeness, people thought Bing was the epitome of the decent American guy who had made it big on the screen.

A look at how Tsar Nicholas II and his wife the Empress Alexandra's complete misjudgement and lack of understanding led to the fall of the Russian Empire from being one of the foremost great powers of the world to economic and military collapse. We explore how their decisions during the war led to widespread public anger and a revolution that would eventually bring a tragic and brutal end to Tsar Nicholas' reign, making him the last Emperor of Russia. Broadcast title: The Tsar and Empress: Secret Letters.

Leonardo was an extraordinary artist and inventor. But researchers have discovered, in ancient manuscripts and drawings that prefigure many of his inventions and trace back to classical Greece, the Arab Empire and even ancient China.

Actress Greta Garbo had a greater impact on her craft than did any other actress in the 20th century. She introduced what is now called method acting to the screen, and in 28 films, 25 of them filmed in the US, redefined the image of women on the screen. Her stunning beauty and style captured the hearts of millions.

For 70 years, rumours have circulated around the small town of Walbrzych in south-west Poland about a concealed Nazi railway tunnel. How, in 1945, the original tunnel was fortified by the retreating German army with 10m of reinforced concrete, and its entrances blown up. And how anyone who spoke of the tunnel was either shot by the Nazis or pursued by the Russians after the war. Naturally, they fell silent - and the tunnel's precise location was lost in the mists of time. Then, in August 2015, ground penetrating radar pinpointed the tunnel's location. It's the 21st century equivalent of an unexplored pharaoh's tomb.

In 2011 a team from the University of Basel made two astonishing discoveries in Egypt's Valley of the Kings. By chance they came across a new tomb that was the first to contain a body since the discovery of Tutankhamun. Then they discovered that the tomb beside it, which had never been excavated before, held the bodies of around 50 people. But who were all the people in these two linked tombs? This film follows the archaeological detective story to uncover the answer. It pursues the trail that leads to one of Egypt's greatest pharaohs, Amenhotep III - and to the women he was close to. And the film also reveals the astonishing project behind the re-emergence nearby of the largest temple ever built in ancient Egypt - the lost mortuary temple of the same pharaoh, Amenhotep III.

The Seven Ages of Elvis sets out to explore exactly who Elvis was and the true meaning of his unprecedented impact on popular culture. Using Shakespeare's Seven Ages of Man as a framework, the film charts the King of Rock 'n' Roll's' extraordinary life, act by act - from his impoverished childhood in the depressed American South, through his meteoric rise to international fame, to his Vegas years and sad death in 1977. Combining archive material with personal testimonies from those who knew Elvis best, the film throws light on the secret to his triumphant, universal success and asks why audiences are still drawn to him 40 years after his death.

From teenage infatuation to her wedding to Hitler and suicide in the fuhrerbunker - Adolf and Eva: Love and War reveals the shocking lengths to which Nazi Germany's secret First Lady went to rise to, and cling to, power. The Nazis kept Eva Braun's affair with Hitler hidden until the very end. But the Fuhrer's inner circle knew she had survived against the odds to become the most powerful woman in Germany. Revealing the truth behind the influential, ambitious and manipulative Nazi bride, this is the story of Eva's incredible rise - and dramatic fall.