Just two episodes left at this point, and no word on a season 2. I don't expect one; NdGT has said the series has taken much out of him and he misses time with his family and such. Don't blame him there. Plus the original Cosmos was only 13 episodes as well. I see the parallel.
Working with just graphite is much harder than I expected. I'm sure it doesn't help I'm doing all the drawings in an average sketchbook rather than on super nice paper (as I would with markers), but also I've never been a great sketch artist; my strength has always been in color. So this series has been challenging on several fronts.
Currently brainstorming what to do for this Sunday, as the show will be on hiatus. Have an idea or two already. NdGT has said he'll be live tweeting about the physics behind NASCAR during the broadcast, so I'm gonna keep an eye on that.