![KPBS Evening Edition | KPBS.org show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/045/749/small/kpbs-evening-edition-kpbs-org.jpg)
Summary: We mark the release of Upstream Color by looking at writer-director Shane Carruth's debut Primer, the dense and confusing story of two scientists who accidentally create a time machine in their garage. Dr. O'Boogie takes a deeper look at the twisted tale of multiple timelines that caused scores of people to desperately search the internet for an explanation.