Second this. It's currently available free on the RSS feed in every podcast directory. The whole back catalog can also be purchased, and IMHO it's well worth buying. I bought it a couple years back and have been very happy with it. I think it's like $80, but you get countless hours of good history from a master storyteller.

His series on World War I (aka The Great War) called "Blueprint For Armageddon" was one of the most interesting and captivating of any podcasts or audiobooks I've ever listened to.

When I was younger the older folks would talk so highly about the days of theater radio, when actors and storytellers would tell audio-only stories. I used to wonder how that could possibly compete with video. After listening to Hardcore History, I get it now. There's something really powerful about listening to a natural storyteller lay things out, and Dan Carlin is a master of the craft. If you're new to him, the last few years of shows are always freely available through the RSS feed that's in every podcast directory.

I have heard that Carlin's historiography isn't great... but I will fully agree that the man is a master storyteller and does wonders for making insanely complex topics comprehensible. Ghosts of the Ostfront was the one that sold me on him.

If he's not dead-on, all the time, well, I can read more later and be corrected.

I had no idea you could just buy his old episodes. May have to go buy them now.