Keeping with LDS tradition, the eighth episode of the final season is quite an event. It's also, similar to some big episodes of the past (Wej Duj, A Mathematically Perfect Redemption, etc.) outside of the primary perspectives of the core Cerritos crew. It's an episode of Lower Decks, but at the same time, not quite one.
The multiverse conceit of this season arc allowed them to go whole hog here with the cameos, and oh boy, do they ever. Lily Sloane, T'Pol, Garak, Bashir, and many variants of Harry Kim, all voiced by the original actors. And a Curzon Dax variant, voiced by some dude. Plus of course William Boimler and an alternative version of Mariner. LDS has never hit the special guest star thing this hard - it's massive fanwank, and mostly successful.
I'm happy as hell that Garak/Bashir was confirmed as a couple, though given these are alternate reality versions, there's still some plausible deniability. Alexander Siddig and Andrew Robinson still have amazing chemistry, and give renditions much closer to their old characters than what they did in the audio dramas. Making Garak a plain, simple doctor and Bashir a hologram was a bit random, but I guess it was meant to represent alternative universe weirdness.
The same cannot be said for T'Pol and Curzon Dax though. Most of the issue with this pairing is the use of Curzon here seems a misfire. Obviously people will care less given it's not a classic Trek actor reprising the role, but the depiction of him in this episode leans very heavily on the episode Blood Oath and little else. I always considered Curzon more of a drunken old letch than a fierce, fun-loving warrior. T'Pol mostly just deadpanned his barbs, and spat some exposition. I think they pulled a few punches where they could have gently ribbed Enterprise (like the Archer comment). Considering what they did with Harry Kim here, I'm not sure why they didn't.
Harry Kim (the many Harry Kims) was great up until the end, where the joke lost coherence. The motivations of Lt. Kim made zero sense here. He decides to mutiny at beginning of the third act, so he can take the ensigns back with him. Then the ensigns mutiny, and he's doing this because?!? I can kind of excuse this because in an already comedic series, this one takes itself even less seriously, but it would have been better (if less funny) if only one Kim was still an ensign, and they mutinied instead.
I don't quite get the Lily Sloane reveal either. I guess her ship was not traveling through space, but just visiting alternative Earths (with Vulcan crew members, somehow) and was just pulled to where Boimler & co could find it due to their actions. But...how is she still alive? I guess it's somewhat sensible as only 60-some years have passed for T'Pol, so the portals could come from points in the past as well. That doesn't explain why so many have been happening during the 5th season of LDS though.
Turning to the "core cast," it was interesting to see the evolution of WIlliam Boimler into a jaded, aged-past-his years captain. I'm glad they didn't play up the Section 31 stuff and just moved on. I think the little touches of how much he missed the Cerritos crew were touching. And it was nice to see a more anxious take on Mariner as well.
Overall, I thought the episode was the funniest and best put together of the season. It's a little bit of a downer that everything in this episode happens in an alternate reality and doesn't impact our actual main characters, but that's forgivable with only an episode left. However, I do need to ding it a bit because of how completely nonsensical the resolution of the final act was. I can suspend disbelief, but only so far, and this ran at least a half mile past that.