This week on Sunday Extra, an investigation reveals how some major cryptocurrency exchanges profit from scams and other cyber crimes, we meet the architect behind Cairo's grand new museum, what is going on with food allergies in Australian, and Google Maps for the Roman Empire.

Plus the Year that Made Me, Tweet of the Week, Background Briefing and Lab Notes. 

What influence is climate disinformation having on tackling climate change, and what are the tipping points that may see the end of the greyhound industry globally. As Nazis reappear on the streets of Sydney, we revisit the investigation team that tracked down Nazis living in Australia after World War Two. Also the challenges of retrieving digital archives from floppy disks.

The final  Boyer Lecture is presented by James Curran, author and professor of modern history at the University of Sydney.

A few questions answered on Sunday Extra today: what was the role of the Chief Justice in the dismissal of the Whitlam government 50 years ago; should there be air quality standards for indoors as well as outdoors; should we all be making time to day dream and how can post-war rubble be turned into something useful?

The 4th Boyer Lecture is presented by Amelia Lester, deputy editor at Foreign Policy magazine. 

Africa Correspondent for Foreign Policy Magazine, Nosmot Gbadamosi on the violence that has broken out in Tanzania after this week's election. Mihai Sora, from the Lowy Institute on a proposal for greater intelligence sharing between Australia and its Pacific neighbours. Kari Byron, former co-host of the science smash-hit Mythbusters on the importance of cultivating a new generation of STEM prodigies. Astronomer Michael Brown on the radical new proposal to use satellites to bring us sunlight on demand. And Darius von Güttner Sporzyński teases out the history and humour of Netflix's new series 1670.

On this week's episode, U Thant the former Secretary General of the UN is remembered by his grandson, Thant Myint U. The extraordinary career of Kenya's Raila Odinga, a politician who ran for President 5 times unsuccessfully but still became one of his country’s most revered figures. And the Egyptian-Canadian journalist and author of One Day, Everyone Will Have Always Been Against This, Omar el Akkad joins us on The Year that Made Me.

Who is Stephen Miller and is he a "root of evil" in the White House? Professor of International Relations, Clinton Fernandes reflects on the 50th anniversary of the murder of Australian journalists in East Timor, known as the Balibo Five. Laura Brown talks about her new book, All the Cool Girls Get Fired.

Sunday Extra is also broadcasting the 2025 Boyer Lecturers. The series is called Australia: a Radical Experiment in Democracy and this week is the keynote presentation from Justin Wolfers and a panel discussion.

On Sunday Extra this week, the doctor in charge of the medical team for the Hostages and Missing Families Forum on the task that lies ahead. Carole Cadwalladr, the journalist who broke the Cambridge Analytica scandal discusses her investigation into Tony Blair’s Institute for Global Change.

And professional troublemaker Stephen Mayne, the founder of Crikey and prolific shareholder activist joins us for a rabble-rousing trip down memory lane on the The Year that Made Me. He speaks publicly for the first time about the rare medical condition that’s changed his life.

On Sunday Extra this week, Australian Murray Hunter detained in Thailand, Syria's first post-Assad election, Australians cutting down on sugar and how to repatriate looted artefacts. 

Plus the Tweet of the Week, Background Briefing and Lab Notes.

Sunday Extra presents a mix of national and international affairs, analysis and investigation.

Chief Justice of Papua New Guinea, Sir Gibuma Gibbs Salika on 50 years of independence and the shaping of a legal system that respects the traditional culture of PNG. YouTuber Gary Stevenson was once Citibank's highest earning trader, but now he is on a campaign to tackle economic inequality. Dr Daniel Heller and Dr Farid Zaid from Monash University on how to have Brave Conversations. And on The Year That Made Me Lou Oppenheim on the unusual journey from a degree in engineering and computational linguistics to Executive Director of the Sydney Dance Company.