This episode hit like a hammer the first time I saw it. Sure there had been hints about there being something wrong with Lorca, but I think the Ash Tyler/Voq situation had me distracted enough the first time that the Lorca thing kinda came out of left field. Revealing his eye problem to have been there as a give away from the beginning is probably my favorite part. It didn't surprise me this time of course, but it was still a solid episode.
Lots of Stamets running around in the mycelial network and finding the mirror version of himself. Burnham delivers Lorca to the emperor and gets the worst dinner ever. Then to save herself from execution she reveals the truth, that she is from a different universe. Fortunately the emperor is aware of the multiverse and doesn't her people to have anything to do with it. Stamets finds out that mirror him is what is damaging the network, and Burnham figures out that her Lorca is actually mirror Lorca just as he escapes.
A nice, fast episode. I kinda skipped the C story, but it mostly resolves the Voq situation, but presumably Tyler is still all messed up. I think the shortness of this episode may have robbed it of a higher score, but it is a great pay off and then setup episode all in one.
8 out of 10