^^this









The first half is spectacular. Starting with a throwaway with Worf's exercise program, which is surprisingly good or at least sufficiently engaging and not overly long, once they get past the credits, the real mystery starts - with the big blob in space that has no resemblance to the one in "The Immunity Syndrome", and even Data isn't pedantically trying to find through the Federation database the one Kirk found. This is conclusively proven the moment they're engulfed in the anomaly. The tone and style of these scenes help sell it well enough... then once they get on the inside, it really takes off. And it only skyrockets from there with numerous unsettling moments that pack a great dramatic punch.
Steeped in atmosphere and weirdness that only sci-fi can do, then Nagilum appears -- as a partial and presumably disembodied head, and was quite the moment. The episode sells fairly well the "differences" shtick, since Nagilum's species(?) probably doesn't reproduce the way all these pesky Earthian mammals do (the same way humans have observed numerous smaller and often edible species to then post on Wiki with probably lurid detail, and how did humans first sample various things to discover if they're edible or not)...
The Picard/Data scene is truly first rate and told so maturely it makes up for all of season 1's jocular fluff. Even "Justice"'s overt flagrancies...
However, the episode is not without its share of flaws, so I'll just hone in on the biggie: Wesley apparently needed his bathroom break at just the perfect moment, since there's no other way to explain why he's in one scene, then is not present with a standby in his place - the one who, you know, is experimented on - then in the next scene Wesley is back, complete without residual wet spot cuz he's that good at everything, go figure.