Ralf Little, Mark Foster, Katriona O'Sullivan and the Inheritance Tracks of Clare Grogan

Joining Adrian Chiles on this week's programme is Mark Foster, for a good while the fastest swimmer on the planet.

We have author and psychologist Katriona O’Sullivan, a woman raised in poverty in Coventry, who went on to get a PhD from Trinity College, Dublin.

And the remarkably gifted Ralf Little, who we know as an actor but might equally have been a doctor or a footballer.

Plus the Inheritance Tracks of the singer-songwriter Clare Grogan.

Producer: Gareth Nelson-Davies Assistant Producers: Catherine Powell and Imy Harper Researcher: Jesse Edwards Editor: Andrea Kennedy