Serial came into being as a spin-off from syndicated radio show, and popular podcast, This American Life (TAL). That show was created by Ira Glass with WBEZ, a public radio station in 1995. In 2015, Ira took full control of TAL after agreeing to share some ongoing profits from it, and Serial.
Serial’s radio connections are sometimes forgotten. The first episode of the show ran on TAL (to its 2.2m radio listeners) as well as its podcast. It acted as a sampler and teaser that encouraged people to log on and listen in October 2014. Serial’s appearance, and radio promotion, alongside the default installation of the iTunes Podcast app in 2012 all together really kick-started mainstream podcasting.