So I was expecting a continuation of the Nora story, but it got side-tracked by a Frost story. Not that I mind Caitlin getting an episode, I just wish it had been its own episode a little earlier in the season. I was really hyped up to see a 'part 2' from last week's show. More later...
For the Frost part, sadly it wasn't done too well. Caitlin's father just suddenly being there at the end was confusing at first without any foreshadowing that Tom was even trying to fight his way free. Or that he was even able to. I was expecting Nora to show up and starts bashing him around without any regard to Cailtin wanting her to stop. And when She'cada showed up I was thinking at first that it was Nora attacking her father for some reason. But hey, the main villain finally showed up...
And yes, of course the green vial turns white when no one is looking.

Why wasn't it an immediate change?
Also, I thought we already understood that Caitlin Frost is
not a META!! That is, after all, why Cicada's dagger has no effect on her. It would also mean that the sirrum made from her blood is not based on anything metahuman and thus her mother was not being turned into a meta, and the test Caitlin was using is worthless if it was meant to discover
metahuman properties in a person who is
not metahuman! Ugh!
Don't the writers have a Series Bible that they refer to just to make sure that don't make these mistakes..?
Writer 1 - 'No, you can't use that word there. According to the Bible, we've already established that Caitlin Frost is not a metahuman.'
Writer 2 'Are you sure...?'
Writer 1 (holding up the Tome and pointing to a page.) 'Yea, says so right here.'
Writer 2 - 'Dammit, then I got nothing!' (Throws down his teeth-gnawed pencil and storms out...)
Oh well...
Since there was very little of the story I was looking to see this episode, there's not much to discuss there. Other than Barry being stupid. He's angry that Nora was dealing with Thrawn even after knowing what Thrawn did to her namesake, believing that he (Thrawn) was manipulating her (Nora) - so he (Barry) 'locks' Nora in the future
with Thrawn! C'mon Barry! That's like trying to protect your child from an axe-murder by locking her in the same room with the axe-murder!
Still, I like the aspect of Nora feeling so abandoned by her family that she turns to Thrawn, who then leads her into being a Sith. That's what I had been hoping this whole episode would be dealing with, rather than now having to wait another week.
And after seeing the preview, I'm thinking it might be a let-down, with Evil Nora just simply working with the Bad Guys to do 'Bad Things...'
I would much rather she was still trying to help Barry to stop She'cada, but now in a more twisted way. Instead, have the 'Negative' Speedforce - and that
really should have been a thing from the beginning - begin subversively turning her into an anti-hero with little regard to right or wrong in the process. Have her attacking and hurting people, even innocents, with her mind only on the ultimate goal of 'saving' her father from his fate. And then have Barry being horrified to realize this and
then having to battle her down in order to save her.
With She'cada thrown in there somewhere for distraction...