In the normally low-profile world of podcasting, “Serial” is a certified sensation—a testament to the power of great storytelling. It’s quickly become the most popular podcast in the world, according to Apple, and the fastest to reach 5 million downloads and streams in iTunes history. “Serial” is the top podcast in the U.S., Canada, the U.K. and Australia, and in the top 10 in Germany, South Africa and India. ~ ‘Serial’ Podcast Catches Fire – WSJ.com