MiB being Arnold is a really cool idea. Love that. I also love the idea of that host damaging his own brain so they couldn't dissect it.
That said, I honestly wasn't a huge fan of this episode. I think I'm starting to realize that, for whatever reason, I have almost no interest in the storylines focusing on solely on the hosts, at least as of yet. All that stuff with Teddy on the hunt for Wyatt and his masked men bored me to death. Watching robots act out a storyline with no real human characters present whom I care about just doesn't interest me. I love watching the guests interact with the hosts, I love all the stuff with the MiB, and I love most of the stuff at mission control (even though the Bernard-and-his-deceased-son thing felt super cliched to me), but the robot-only scenes just don't resonate with me at all for whatever reason.
I know it's only one subpar episode (IMO) out of three, but I really hope this doesn't turn into a show where I'm more invested in the lore and trying to "figure it out" than I am in the episode-to-episode storylines. That, and I'm hoping we're finally moving past watching the hosts go through the same loop / story queues over and over. I realize the point is to show how the hosts are subtly changing and evolving, but it simultaneously makes the plot feel like its moving extra slow and treading water a bit. Something about this episode also felt very SyFy Channel-esque and distinctly not HBO, but I can't quite put my finger on it. It just didn't feel as refined for some reason.
Anyway, I guess I just need more reason to care about the plight of the robots and maybe that will come with time. Overall, I'm definitely still in, and there's so much legit intrigue, I just wasn't as engaged this episode as I was for the first two.