Truly excellent episode. Well-worthy of a season finale. Really enjoyed it.
Despite the added length, a bunch of things were still rushed through though. I understand, as even the lengthened episode is only 21 minutes. But I really reckon R&M could do with a feature-length film or something. I find that often, when it takes its time to go through things, R&M is at its best, and when it goes to muted montages, it's at its weakest.