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With millions of people on the move around the world, the novelist Mohsin Hamid has set his latest novel against the backdrop of the refugee crisis. He tells Kirsty Wark how he imagined those fleeing home passing through mysterious black doors into other parts of the world. The lawyer and sociologist Carol Bohmer examines the culture of suspicion which greets migrants when they arrive. She looks at how officials judge the line between truth and deception, and increasingly label people as liars, criminals or terrorists. While many countries are looking to fortify their borders, the former Portuguese Europe Minister Bruno Maçães believes we need to think on a super-continental scale. He travelled overland from the edges of Europe to the heart of Asia arguing for a new world order. But the theatre director Robert Hastie is more interested in what connects people to the land and their origins, as he revives Peter Gill's play The York Realist - a reflection on the rival forces of place, class and longing. Producer: Katy Hickman.

Art was power for Britain's kings and queens. In a new BBC TV series, Andrew Graham-Dixon visits the paintings amassed by King Charles I, the first great royal collector in British history. He tells Andrew Marr why after Charles was executed his royal artworks were flogged across Europe. The lost royal collection will finally be reunited this year in an exhibition at the Royal Academy of Arts. Historian Leanda de Lisle brings the Stuart monarch back to life in her biography White King. But was the art-loving king a traitor, a murderer or a martyr? And it is not only kings who use art to impress. Don Thompson meets hedge fund managers and foreign oligarchs in his study of the contemporary art scene, while artist Kelly Chorpening describes the role of Camberwell College of Art in shaping the art scene. Producer: Hannah SanderPicture credit: Anthony van Dyck (1599-1641), Charles I in Three Positions, 1635-36 Royal Collection Trust / (c) Her Majesty Queen Elizabeth II 2018, www.royalcollection.org.uk.

The prize-winning novelist Peter Carey tackles head on for the first time the legacies of colonialism in his native Australia in his latest book, A Long Way From Home. He talks to Tom Sutcliffe about the damage and loss for the Stolen Generations. The writer and broadcaster Afua Hirsch believes Britain is also a nation in denial about the past and present, and argues it's time to talk more openly about race and identity. The Dutch journalist Geert Mak once travelled the breadth of Europe to explore what it meant to be European at the end of the 20th century. He found countries struggling to understand the wrongs they had committed during the Holocaust, the Second World War and decades of dictator rule.