Terry Gross

Epidemiologist and one of the world's leading experts on Alzheimer's disease, David Snowdon. In 1986 he began what he calls the "Nun Study," following a group of aging nuns to better understand why some of the sisters were able to age gracefully, retaining their mental faculties, and others were not. He studied 678 nuns who belonged to The School Sisters of Notre Dame. His study was published in The Journal of Personality and Social Psychology.

Actor Colin Firth. Up until now, he was probably best known for his role as Mr Darcy in the BBC/A&E production of Pride & Prejudice. The film turned him into a heart-throb. He stars in the new film Bridget Jones's Diary based on the book of the same name which borrows from the storyline of Pride & Prejudice. He plays hate/love-interest Mark Darcy. His other films include Valmont, Another Country, The English Patient, Shakespeare in Love, and Fever Pitch. Firth shows off his writing in the new book edited by Nick Hornby, Speaking with the Angel. (Riverhead Books).

Film critic Henry Sheehan reviews the new Australian film Chopper.