Dan Carlin's Hardcore History (long episodes)
Oh yea, this is AMAZING.
Loved his WW1 series, I was gripped, start to finish. The man has a serious talent at putting these podcasts together.
In fact calling them podcasts probably isn't quite right, the series ones are more like documentary series. He is so good with his delivery, and I love the way he cites research and sources - he is careful to tell you what is accepted as fact and what is disputed, and he gives good background on different historians as he goes.
Found them...thanks