Looks like "Baseball Blues/Brain's Biggest Blunder" re-aired. Both were episodes I did not see on their original air date.

Here are my thoughts on each.

"Baseball Blues": I agree with Mr. Rocketburn saying that it was a lot like "Arthur Makes the Team" (you may have noticed that I tend to bold the names of episodes; this is to distinguish them from the rest of the text). Though there's that whole cliche "The expert/hero/legend can't make it so a rookie must take his/her place" that I've seen countless times in other shows and media. This "trope", I guess you could call it, was also seen in "Brain's Chess Mess", except Rattles faked it. And one thing that I really wanted to say is that it was surprising not only seeing Harry Mills reappear, but also that he had buckteeth like Buster. Strange.

It's pretty cool that we see Carl in here, even though I don't think he had any speaking lines (I missed the first part of the episode). So, yeah, looks like they didn't do another one-or-two-time character that would be written out later. It's a sign that we might see him in more George episodes.

"Brain's Biggest Blunder": Surprising seeing that Steve character way back from the older seasons. Anyway, during the actual competition, it seemed more like Buster dozing off and getting distracted in his own thoughts than him actually trying and struggling. I guess that's how a lot of people are, so it's hard for me to make a judgment personally; after all, this is coming from someone whose strengths are math and science. But I like the lesson of using a study method that works for you. That's how many people memorize things that they initially struggle with. Now, I don't know whether Brain's training methods really made him a bad tutor, but it's clear that Buster didn't like them. I mean, if you need something done well, you should put a lot of discipline and effort into it.

As for the voices, it's still hard to get over how different Arthur's voice sounds from the earlier seasons by which I remember him. But when he was whispering to Buster that one time, he actually did sound a bit like Arthur.