"We've had one, yes. But what about second black hole?"
Well, I've found I can't just properly review it as an episode, because for the first time in me watching Discovery, this hour truly felt like just an act of a larger story, the monumental, thrilling closing act of an action-adventure movie. After the relative letdown of the previous two weeks, today's episode was an exciting heist all around with rough landings, going undercover, quick-fire brainstorming sessions and coded messages to avoid the villain's suspicion, all thoroughly enjoyable so I could even excuse the plot contrivances needed to have Burnham and Moll and only those two enter the portal at the end. I mean, was it stupid of the Breen to try and throw Burnham and Book in the brig with only two guards so that they could easily dispatch them the moment they're left alone? Of course, but it's stupid in every other movie and it never bothers me so it didn't this time either.
Michael and Book blundering their way through Breen culture was fun to watch, even though this once I really felt that discussing their relationship was out of place, even if Book replied in kind without implying this wasn't the right time. I personally would've preferred they have this talk while preparing for the mission, but ah well, a small nitpick in the overall big picture. Tilly was also in her element today, blowing that stubborn strand of hair out of her eye after the rough jump was the very picture of cuteness, and her interactions with Rayner who showed an uncanny talent of getting her to focus by sternly but neatly snipping off her wayward trains of thought were also hilarious.
I also enjoyed Saru and T'Rina's subplot, they're always refreshing to see in how they play with our (and Saru's) expectations with their conflicts and misunderstandings appearing as classic relationship tropes first before revealing their entirely different context. When T'Rina wordlessly left after Saru volunteered, the episode let us follow his worry that she might be afraid of losing him and wanted to keep him away from the mission, when it turned out she actually just had rational concerns about his emotional involvement possibly affecting his reasoning, something that Saru was all too happy to refute. His words of reassurance as well as T'Rina's argument that it would be illogical to make him promise to return so she'll only ask him to try his best were really emblematic of their delightfully unique romance.