The Godfather of heavy metal, a legendary reality star and Birmingham’s favourite son - Ozzy Osbourne certainly has the makings of a genius. But was there something darker lurking beneath the leather trench coat? Lindsey Santoro, Hasan Al Habib, and Alexandra Haddow are tasked with examining whether the Prince of Darkness lives up to his name.

Additional material: Christina Riggs, Ruth Husko and Katie Sayer

The producer was Katie Sayer. Evil Genius with Russell Kane is a BBC Studios Production for BBC Sounds.