Dr Jeremy Farrar talks about his experiences on the frontline with avian flu in Vietnam, and his priorities as the new director of the Wellcome Trust medical research charity
Astronomer Chris Lintott tells Jim Al Khalili about "Citizen Science" and crowd-sourced astronomy project Galaxy Zoo, and of working with Brian May and the late Sir Patrick Moore.
The guest is Dame Julia Slingo, the chief scientist at the Met Office. The conversation ranges from her childhood wonder of clouds to climate change's part in this winter's floods.
Jim Al-Khalili talks to neuroscientist Professor Sophie Scott about how brain imaging is revealing secrets of human speech and why laughter is such an important human social tool
Life on earth has gone through a series of mass extinctions. Mike Benton talks about his fascination with ancient life on the planet and his work on the Bristol Dinosaur Project.
Mark Lythgoe runs the largest medical imaging facility in Europe. He talks about coming to science late after failing his A Levels and why he enjoys collaborations with artists.
Joanna Haigh studies the influence of the sun on the earth's climate using satellites. She talks to Jim al-Khalili about her fascination with climate and how it is changing.
Russell Foster, Professor of Circadian Neuroscience at Oxofrd University, is obsessed with biological clocks. He talks to Jim al-Khalili about how light controls our wellbeing.
Jim Al-Khalili talks to Professor Liz Stokoe about her research analysing real life conversations from first dates, neighbours and police interviews with suspected criminals.
Is it more reckless to eat a bacon sandwich everyday or go skydiving? Jim Al-Khalili talks to David Spiegelhalter about risk, uncertainty and the real odds behind everyday dangers.