If a woman is involved in a car crash, she is 17% more likely to die than a man in the same crash. In this episode, Caroline investigates why... and comes up with a campaign to fix crash testing. To email Euro NCAP President Niels Ebbe Jacobson with a message asking for more transparency, just click through to the link on the Tortoise site.

In this bonus episode we get to hear more from Dr Tim Nutbeam, the researcher behind the finding that women are nearly twice as likely as men to get trapped in a car following a crash. Tim talks Caroline through the even more shocking sex disparity he uncovered subsequently – and explains how we nearly didn’t get to see any of this research at all.

In this episode the Visible Women team try to get to the bottom of one of the world’s most trying problems: the paucity of pockets in women’s clothes compared to men’s. Caroline speaks to a pocket historian, learns to make her own pocket, and takes on some troubling mysteries.