EXCLUSIVE: Cassie Sainsbury speaks from prison. Why did she try to smuggle cocaine out of Colombia?; Singing superstar Shania Twain comes out of hiding; and shark attack victim Glenn Dickson gets back in the water.

How a town on the other side of the world could unlock a cure for Australian Alzheimer's sufferers; Beating a broken justice system; A new direction for One Direction's Niall Horan; and a woman's extravagant life in a billionaire's harem.