Extreme heat is currently smothering the northern hemisphere, but could Australia face a similar heatwave this summer? A former prisoner of war held by Russian forces tells his story of survival. Plus Sarah Ferguson interviews Anna Funder.

Trials for the drug Donanemab indicate it could slow the progression of Alzheimer's, but not everyone is convinced. Sarah Ferguson interviews the Prime Minister of Tonga, Siaosi Sovaleni. Plus the scientists hoping to get lab-grown meat onto your dinner plate.