Oh, you're talking about the episodes with Johann Hari, right? Dude's a brilliant writer. He came on the podcast a couple of times and we had some intense conversations about drug addiction, the war on drugs, and stuff like that. They were insightful discussions. However, I can't remember the exact episode numbers off the top of my head, but they're definitely worth a listen if you're interested in this stuff. Just search "Joe Rogan Experience Johann Hari" and you should find them.