I remember one about the battle of Verdun that I thought was particularly good.
Sadly, I missed that episode. I actually bought the 2-part comic-book adaptation so that I'd have the story. (Yes, they did comics adapting the episodes.)
He might be. That version of Indiana Jones has been completely wiped from all current versions of the series.
The Old Indy frame sequences were insisted on by the network, and weren't part of the series as Lucas imagined it. So when he got the chance to present the series his way, he eliminated them. I suppose they were kind of gratuitous, although I really liked George Hall as Old Indy.