The Joan of Arc series has just begun but Bob doesn't keep his episodes up for more than a few weeks. Although in looking through the archive I see he has a few months worth of episodes. He sells CDs of his series later so he takes episodes down fairly soon.
If you think you might be interested, grab these now. In the past, I have found Bob to be very fair and even-handed, giving careful consideration to all points of view and usually choosing the most reasonable.
Pick up episode at the History According to Bob archives or via iTunes. The first episode is an overview, posted on April 11 and there has been one other episode since then.
If you look through the existing archive, Bob also has part of a series about the crusades and the Teutonic Knights and such matters so you may want to try those also.