Detroit, 1920's, prohibition is in full swing and a juvenile street gang is started up by the Burnstein brothers. Abe, Joe, Raymond and Izzy call it 'the Purple Gang.' Justin details the purple gangs involvement in several turf wars, bootlegging and the laundry industry union. They controlled all of Detroit's vices and they were number one until the Collingwood Manor Massacre, then, things changed for the Burnsteins. 

North of Detroit, Clarke delves into Aurora or the Northern Lights. The colourful dancing lights in the sky that have led to legends, stories and myths that have lasted centuries. Some say it's a gateway to heaven others say it's spirits playing football with a Walrus's head. But actually, it's solar particles crashing into the atoms in our atmosphere. Find out how you can run your telegraph system with auroral current instead of batteries in episode 27: Detroit's Purple Gang and the Northern Lights.