Four years ago, on November 24, 2014, the first episode of the podcast Reply All came out. It’s a podcast about the internet hosted by Alex Goldman and PJ Vogt. And since then, they’ve put out 131 episodes. The show has gotten over 100 million downloads so far. Robert Downey Jr. is going to star in a movie based on one of their episodes. And from the debut, it’s been one of my favorite podcasts. A while back, in 2015, I did a special edition of Song Exploder for Reply All, about their theme song by Breakmaster Cylinder. I’d hear the guys talk about the Mysterious Breakmaster Cylinder in the show’s credits, but I didn’t really know who or what that was. And I wanted to find out more. So in honor of the four year anniversary of Reply All’s launch, I’m putting out this special crossover episode for the first time here on Song Exploder.