In Kenya, a young lawyer is bringing a legal case against the Kenyan government, regulator, and several multinational agrochemical companies. He’s working alongside activists and health practitioners, and they claim that hazardous pesticides and herbicides, designed to make farming for efficient, are damaging the health of farmers in Kenya. They are demanding changes to regulation, as well as increased education and compensation for people who they claim, have had their health severely affected by high exposure to these products. For Assignment, Josephine Casserly travels to Kenya to follow lawyers, health practitioners and scientists as they face the challenges of gathering evidence to support their case.

The American artist James Turrell is famous for his Skyspaces. A Skyspace is chamber with an opening to the sky. Turrell bathes the roof with light that subtly changes colour, which affects our perception of the colour of the sky itself. Julian May travels to ARoS, the Art Museum in Aarhus, Denmark to meet James Turrell as he prepares his latest SkySpace, entitled As Seen Below – The Dome. It is a monumental work, which from the ground outside looks like tumulus, an ancient a grass covered burial mound. To experience the work Julian goes through an underground tunnel that brings him into the huge domed space flooded with changing coloured light. Through the opening the sky appears at once immensely deep, yet close. James Turrell tells Julian that while most artists depict light, light is his material; his work is light itself. He speaks about how flying (he gained a pilot’s licence at the age of sixteen), the changing colours of the sky and the disorientating experience of speeding between clouds and fog inspires him. How, too, his upbringing and life as a Quaker has a profound influence. This episode of The Documentary, comes to you from In the Studio, exploring the processes of the world’s most creative people.

Cars driven by Israeli volunteers wait at check points to give lifts to sick Palestinians to their hospital appointments - what the volunteers call “one hour of peace”. Since Hamas’s attacks on 7 October, it has become an increasingly rare space for Israelis and Palestinians to speak and build trust and connection amid the trauma of war. Most Palestinians from the occupied West Bank are prevented from travelling to Israel, among them patients in desperate need of specialised medical treatment. Some days there are more than 80 car rides, volunteer drivers, waiting at the checkpoint, by the separation barrier that divides Israel and the West Bank. Meanwhile in Gaza, patients who used to receive medical care in Israel are among around 20,000 patients on a long list awaiting medical evacuation. Jerusalem reporter Naomi Scherbel-Ball hears how they have survived more than two years of a devastating war, displaced from their homes and reliant on a health system all but destroyed by war. She also meets the Israeli volunteers, who had friends and family killed on 7 October. Despite the war, some have stayed in touch with the patients they used to drive from Gaza.

When it comes to conservation, adorable and majestic animals often attract the most concern for their plight. It's not so easy to get the public's attention when it comes to animals that are perceived as weird or creepy or downright unpleasant. The vulture, traditionally associated with death and carrion, falls into this unlucky group. Globally, around 70% of vultures are now under threat of extinction and Nigeria's vultures are no exception. BBC West Africa journalist Makuochi Okafor has been investigating this story.

 In Vietnam, The Last Empress, a new film inspired by the life of the final empress of the Nguyen Dynasty, appears to be provoking a strong reaction. Nam Phuong is a well-known historical figure in Vietnam, who along with her husband, Bao Dai, she was also seen as a puppet of the French colonial regime. Since the release of the trailer for The Last Empress, this long debate in Vietnam has bubbled back to life. Duc Ha from the BBC's Bangkok bureau has been exploring the human story behind all the politics and controversy.

In a private party in a Russian town, Katya was about to blow out the candles on her 30th birthday cake when masked men burst into the nightclub that she had hired and began physically and verbally attacking her friends. The swoop was instigated by a vigilante group who want to accelerate President Vladimir Putin's promotion of what he sees as traditional Russian family values. As is sometimes the case in these raids, members of the town's police also joined them, shutting down the party and interrogating the guests. Amalia Zatari of BBC Russian has been looking into this vigilante group.

The Fifth Floor is at the heart of global storytelling on the BBC World Service, bringing you the best stories from journalists in the BBC's 43 language services. We're here to help you make sense of the stories making headlines around the world; to excite your curiosity and to get to grips with the facts. Recent episodes have investigated Russia’s youth armies and how they make soldiers of Ukrainian children; featured the BBC team who were the first journalists to the site of the Nigerian school kidnappings and reflected the effects of internet blackouts in Iran, Uganda and India. If you want to know more about Venezuela’s acting president, Delcy Rodriguez, and the legacy of Hugo Chavez; or how Vladimir Putin’s network of deep cover spies operates; or why Donald Trump signed an executive order granting white South Africans asylum in the US, we have all those stories and more.

This episode of The Documentary comes to you from The Fifth Floor, the show at the heart of global storytelling, with BBC journalists from all around the world.

Presented by Faranak Amidi.

Produced by Laura Thomas, Caroline Ferguson and Hannah Dean.

(Photo: Faranak Amidi. Credit: Tricia Yourkevich.)