This episode largely focuses on Georgiou and her illness. We find out that others who've traveled through time and across universes have developed similar conditions. There's no known cure for this, but of course, the Sphere data has an idea.
I'm not gonna lie, the Sphere data is starting to jump in and save the day a little too often. It feels too good to be true, and I'm hoping there's eventually a downside to it because it's getting to be too much. It's too convenient, but I don't want Georgiou to die either, so I guess I can go along with it.
The Discovery goes to Dannus V to find whatever the Sphere data is leading them to, and they find a random guy and a door. This whole situation might be one of the most bizarre in the show yet. It's a little hard to suspend my disbelief for this, and I don't feel like we ever get a good explanation for what's happening. It doesn't make sense.
Somehow, going through the door takes Georgiou to the mirror universe where she is once again emperor, and she's forced to relieve part of her life.
While I expected Georgiou to be different after her experiences, I wasn't prepared for just how much the prime universe has changed her. Considering how she's acted towards Saru, her apparent horror at the idea of him being eaten was jarring. Of course, it shows that she has actually come to admire Saru in some way even if she doesn't let on, but the outburst is surprising when she had lived a whole lifetime where eating Kelpians was commonplace. I'm not saying that she shouldn't feel guilty for it now, but the way the "no" bursts out of her seems strange since she should have been expecting it.
On a lighter note, we get to see Airiam! It's mirror Airiam, so she's actually an entirely different character, and she's probably terrible if we got to learn anything about her. But it was a nice surprise. I'm happy that the actress agreed to come back to play her, and it makes me sad all over again that Airiam has died.
We're in Terra for the next episode too, and I'm looking forward to talking more about what choices Georgiou ends up making.