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.)
Illustrated by Dan Berry! I used to have those, too.

The amount of time spent on World War I in the series doesn't bother me. As a proportion of Henry Jones Jr.'s life at the time, World War I was a hefty percentage of time. What does bother me, but I accept it because it's part of the fiction, is how he seemed to be able to go anywhere and do anything during the war. "Okay, which front is he visiting this week?"
