Does anyone know of any really good history specials that say.. the BBC or PBS have done? I want to learn more about Ancient, Medieval and Early Modern history and I was hoping there were some good history films/specials that went into greater depth than the typical surface crap you usually get on the History Channel. Anyone got recommendations?

Any source, hopefully of a longer length.. like a series length or something. That would be most excellent. Just general history from an era.. like the general history of ancient Mesopotamia, or Greece or Rome or Asia.