When Kevin Burkart dove into a murky lake to find a lost wedding ring, he did it for nothing. But did he really gain something much more?

In this episode of Sideways, Matthew Syed explores our preoccupation with rewards and their impacts.

With author and lecturer Alfie Kohn, Headteacher of Barrowford Primary Rachel Tomlinson, Felicia Schaefer and Kevin Burkart.

Presenter: Matthew Syed

Producer: Leigh MeyerSeries Editor: Katherine GodfreySound Design and Mix by Naomi ClarkeA Novel production for BBC Radio 4