We explore the vast rail network that crisscrosses Tokyo. With 148 train lines carrying some 40 million passengers daily, Tokyo hosts the world's largest and most interconnected urban rail network. Actor Sato Takeru takes on a riddle-solving mission tied directly to the train schedule, putting the railways' famed dedication to punctuality to the test in the process. We uncover a fascinating history and meet the people whose tireless dedication keeps the whole intricate operation running like clockwork.

The work of a Thailand hospital devoted solely to treating elephants. Reveals the day-to-day challenges of dealing with supersized patients suffering everything from deadly viruses to cuts and parasites. It also shows how the facility teaches baby elephants new commands and even turns elephant poo into fertiliser.

On these rides, we've often met people who battled hard times to emerge stronger than before. We've heard stories of overcoming natural disasters and disease, of a doctor taking on the challenge of singlehandedly caring for the elderly population of a remote mountain village and of how one young woman is raising a family on a tiny island, ensuring a future for its aging community. In this special episode, we get back in touch to hear their inspiring accounts of coping with the current pandemic.

A century ago, in the aftermath of the First World War, Britain established vast war cemeteries to honour each individual who died serving the nation. The Commonwealth War Graves Commission set up to run them became famous for its principle of equality in death for everyone, regardless of the military rank or their role in civilian life. David Lammy journeys across Kenya and Tanzania to find out why many African soldiers and porters were overlooked during the conflict, and their names forgotten. He also looks at the impact this has on modern Africa and its communities today, and why he believes Britain has to put this right.

Over a billion euros has been invested in cycling across Europe since the start of the pandemic. Some of the continent's biggest cities are being transformed as people seek alternative, safer, greener ways to move around. Anna Holligan travels across Europe to see how people are getting on their bikes and asks if the surge in cycling is the start of a much bigger change in the way we travel.

Spaces Deepest Secrets: Jupiter: Mystery of the Solar System
Generations of astronomers have attempted to solve the mysteries of Jupiter, the most fierce and extreme planet in the Solar System and now experts reveal new evidence that could unlock the secrets of why this planet is so strange.

Inside Rolls Royce Factory: Building Future Jet Engines
Sam Chui visited the Rolls Royce Engine factory in Derby, England in January. This episode takes a detailed look at how Rolls Royce builds the XWB engine, the exclusive engine on Airbus A350. We also take a look at the various engine test bed sites, including their latest test site bed 80 which is under construction. In the vlog Rolls Royce explain what went wrong with their Trent 1000 engines on the Boeing 787, also their future plans for the much bigger Ultra Fan Engine.

Thirty-four people died in Australia in 2019 as the worst bush fires in living memory swept across the country. An area roughly the size of England was devastated and thousands of homes were destroyed. A year on, Panorama hears from the people living in the path of the fires and the firefighters who risked their lives to save them. And as this year's fire season gets underway, Clive Myrie asks if these levels of destruction are to become normal.

Our Lives offers an intimate insight into the difficulties faced by a tight-knit family business in the Scottish Highlands. Jamie and his sister Jean run the roadside recovery company their parents began in 1973, rescuing stranded motorists from some of the wildest landscapes and challenging roads in Britain. During the busiest month of the winter, they strive day and night to rescue everything from sports cars to 42-ton trucks. It's tough work, but they take great pride in seeing people safely on their way.

In 2010, Danish director Mads Brugger received an email from a stranger who had seen a documentary he had made about North Korea. He asked if Mads would be interested in making a new film about his quest to become a member of his local North Korean 'friendship' association in Denmark to enable him to travel to Pyongyang undercover. There are Korean Friendship Associations (KFA) in countries around the world, and their members, bizarrely, are devoted to the glorification of the world's last totalitarian communist dictatorship.