I'll agree the first Nano ep was among the weaker eps from S1, though the writers do get points for trying to stray away from the Shredder subplot early on in S1. I found the second ep to be quite enjoyable though. S2 had a few stand-alone eps that were very entertaining. My fave of that lot was the "hockey" episode. On the surface it's a terrible ep however it's a great TMNT-Casey story w/ lots of great comedic dialogue. I miss Casey Jones. The guy can brawl but he's an enjoyable lummox during downtime.