Fair warning, when you do eventually get to the final season (retitled "Tales of the Teenage Mutant Ninja Turtles), DO NOT watch the episodes in their original broadcast order (which is sadly how they are arranged in most places). Nickelodeon aired them drastically out of order from how they were produced (airing two story arcs only on Nicktoons, even, instead of Nick proper), which made for a much more jumbled viewing experience. The original production order flows much better overall, and uses a more appropriate story arc as the series finale, rather than the one that aired last on TV, which didn't feel like a proper ending at all compared to the actual last one produced.
Well, that explains why "New Girl in Town" and "I Monster" were in different orders between Netflix and Vudu. Thanks for the heads up. Looks like I'm going to need to make a spreadsheet.