I listen to many history podcasts. Dan Carlin's Hard Core History is great. Mike Duncan's History of Rome is fantastic. His Revolutions Podcast isn't as good but not bad. David Crowther's history of England has delighted me. After you get past the Anglo Saxons things really pick up. His dry humor is a weekly delight. If you have listened to the above and are still hungry for some history check out When Diplomacy Fail's. It is sometimes riveting but fails every once in a while. Aside from history podcast's I enjoy On the Media, occasionally Joe Rogan's podcast is great. Lou Reads The Internet is good if you want to listen to the most horrigying shit that has ever been put online and if you liked Serial than Undisclosed is a good follow up. If you have listened to all the other history podcast that I've mentioned and are hungry for more I've got a few more suggestions that are decent. I should have mentioned 12 byzantine rulers, which was damn good, listen to it.