Roll up, roll up... plenty to see here. P.T. Barnum was, in so many ways, The Greatest Showman. But his success as a circus pioneer came at a great ghastly cost to many. Sara Pascoe, John Tothill and Gbemi Oladipo weigh up those costs to decide whether Barnum was evil or genius.

Additional material: Eve Delaney and Christina Riggs

The producer was Sasha Bobak. Evil Genius with Russell Kane is a BBC Studios Audio Production for BBC Sounds.