In this episode of Oddity, we examine the hotly debated phenomenon of spontaneous human combustion. For hundreds of years, there have been reports of people bursting into flames, seemingly without being set alight by any external heat source...

Sources and further reading:

Wikipedia - Spontaneous Human Combustion / John Irving Bentley / Mary Reeser / Wick Effect / Death of Michael Faherty

'Spontaneous Human Combustion', The Independent online: http://www.independent.co.uk/life-style/health-and-families/features/spontaneous-human-combustion-woman-who-suffered-burns-in-germany-spurs-debate-about-controversial-a6722166.html

'Spontaneous Human Combustion', How Stuff Works: http://science.howstuffworks.com/science-vs-myth/unexplained-phenomena/shc.htm