Master's helmet is made of that or maybe Besker.
The first time it happened, I thought he had damaged them with his lightsaber and they fixed them on the fly, but that padawan looked surprised when it started working again. They did it enough that we were supposed to notice. He is doing it somehow.
Sol still has a secret and he has a lot of shame attached to it. Until that scene, I assumed that they all just felt bad about how things went down that day, but no. They did something they are ashamed of that is still a secret to Osha and us. And when you do something dangerous at work and cover it up, I believe you risk a heavy fine when OSHA finds out.
I think the twin swap was handled awkwardly. I think they laid it out clearly enough that someone who is paying attention can see what happened, so I don't know why they didn't just take the extra couple seconds to actually show it instead of imply it. They were not coy enough if they wanted it to be a surprise later. But whatevs. Sol gave her a strange look that made me think for a second that he knew they had switched. I think he would be glad to take Mae to Coruscant, but if he was in on the secret I think he would have looked around for Osha. Qimir already showed he was good at telling them apart, so I'm sure he knows he has Osha. He is probably done with Mae and hoping he can turn Osha.
It feels like we are learning that Mae is not really as bad as she originally seemed to be. I thought for a second she was going to infiltrate the Jedi and kill a bunch of them, but I think she actually wants to see the inside and maybe felt like it was her best shot at escaping alive.
Qimir went and said the S-word, but I think we've seen enough to back Ki-Adi on this. The guy is unquestionably talented. He won't say who trained him, but he asked Sol if he didn't remember him and I feel like he meant more than, "we just ran into each other at the drug store the other day". I wouldn't guess that he's actually a failed Padawan like Osha, because he really feels like an outsider, but their paths crossed some time. Qimir would like to be a Sith and would like the Jedi to call him one, but he isn't very sophisticated and doesn't seem ready for prime time. Very talented and skilled for sure, but he doesn't know who he is and he doesn't know what he wants. Not really. He's trying to prove to himself that he's somebody. He may have found a holocron or something. He probably thinks the Sith are gone like everyone else does and has in mind to restart it. It would be handy to have a final episode scene with the real Sith master and apprentice discussing how Qimir's poser days are done.