Equilibri by Okuda San Miguel

Artist Ron English travels across the country illegally putting up artwork of President Obama and Abraham Lincoln merged together.

'No Free Walls' is an in-depth look at Brooklyn's changing landscape, through the eyes of Joseph Ficalora, the founder and inadvertent art curator of the Bushwick Collective art project.

Dr Richard Clay goes in search of what it is that has made us scribble and scratch mementoes of our lives for more than 30,000 years. From the prehistoric cave paintings of Burgundy in France, through gladiatorial fan worship in Roman Lyons to the messages left on the walls of Germany's Reichstag in 1945 by triumphant Soviet troops, time and again we have wanted to leave a permanent record of our existence for our descendants. And it may be that this is where what today we call art comes from - the humble scratch, graffiti.

A wall can be a barrier. It can be a structure of limitation or a source of repression. For the Inside Out Project, a wall is a canvas, and so are sides of trains, the arches of bridges and the steps leading to Brooklyn brownstones. This fascinating documentary tracks the evolution of the world’s largest participatory art project, the wildly popular Inside Out. From Haiti to Tunisia, South Dakota to the streets of Paris, French artist JR motivates communities to define their most important causes by pasting giant portraits in the street, testing the limits of what they thought possible. The power of paper turns people who feel without voice into unlikely activists by empowering them with their own images.

Two street artists with contrasting intentions about the artform tell the relevance of street art in society while accompanied by an enigmatic graffiti writing, “Bon Jovi.”

As the walls of Cuba's ageing infrastructure continue to crumble, a burgeoning street art scene is born in Havana. Murals of hand-painted masked character – Supermalo – with the tag “2+2=5?” have begun to appear in seemingly every corner of the heavily foot trafficked city.

A child who just loved to skate from the age of eight, Poppy Starr Olsen became the number one female bowl skater in Australia at 14 and went on to take out bronze at the XGames at 17 - the ultimate competition in the world of skateboarding. The same year, skateboarding was announced as an official additional sport category at the Tokyo 2020 Olympics. Now faced with the opportunity to represent Australia on the world stage Poppy grapples with the transition from skater to athlete and the pressure of competition mounts in a way it has never done before.

Some argue that modern graffiti was born in Philadelphia, where the pioneers of wall-writing became citywide celebrities during the late 1960s and early 1970s. Graffiti eventually consumed the city, and a new mayor made it his top priority to fight back. In the process, the city's Mural Arts Program was born. Philadelphia is now a great outdoor museum. Yet graffiti still thrives, with new writers always ready to replace those who are caught or quit.

Banksy is the world's most infamous street artist, whose political art, criminal stunts and daring invasions have outraged the establishment for over two decades. Featuring rare interviews with Banksy, this is the story of how an outlaw artist led a revolutionary new movement and built a multi-million dollar empire, while his identity remained shrouded in mystery.

In Unión Hidalgo, Oaxaca, México, there is a group of people who pay homage to living characters in the community through urban murals, generating an identity that is reflected on the walls of traditional houses.