Episode 9, about technologies invented before their time, was pretty good. This is a more interesting historical episode than their heist and scam ones, because it's about science and invention, so I learned stuff. The Teleharmonium segment was particularly fascinating -- I even learned something I hadn't known about the Hammond organ and how it worked. I do think it was a stretch to refer to Edward Muybridge's film loops as "animated GIFs," though (not to mention that I think they were mispronouncing "GIF" -- I gather its inventors intended it to be pronounced with a soft G). And the brief segment about the "1920s wireless 'phone" was a waste of time, unless it was to debunk the Internet meme that this was a thing. (I've read about this before -- they could've covered the fact that the word "telephone" was originally used to refer to radios as well as two-way communication devices.)
Speaking of words, I'm a bit annoyed that they keep using "criteria" as both singular and plural. The singular is "criterion."