Ash and Alice have talked a lot about the actions we can take to change our behaviour but what about the impact of the environment around us? So Ash takes a trip to Paris where in a little lair in the middle of the city there is a secretive government department trying to change public behaviours. They are doing it through a technique called nudging, which tries to make little changes in the environment to help people behave better.

Ash talks to his friend Mariam Chammat who runs the department about her background in neuroscience and how understanding the brain helps with understanding how people behave. Then Alice talks to the writer Gretchen Rubin, who gives us tips on how we can use nudging to make our own lives a little easier.