- Cliché Storm: A lot of familiar Star Trek tropes appear in the episode, including a Red Shirt Black Dude who Dies First, Worf behaving like an animal with a Hair-Trigger Temper, a Negative Space Wedgie the Enterprise crew is interested in exploring before becoming desperate to escape from it, and a Sufficiently Advanced Alien who wants to kill much of the crew just to satisfy its curiosity. However, it came early in TNG's run and was well-executed enough that it's able to get away with it for the most part.
- Harsher in Hindsight: Worf remembers an old Klingon legend about a starship-devouring monster in regards to the situation at hand. Years later, another ship would run into the real one.
- Memetic Mutation: Haskell's over-the-top death scene has become a popular reaction gif.
- We have a frustrated Worf crying out "There is one bridge. ONE BRIDGE. ONE RIKER. ONE BRIDGE." Then proceeds to gargle some sort of growl as he fights with a door to keep it open.
- Worf, I am acquainted with the Yamato. Recommend the aft station of their bridge. When in doubt, surprise them. The Yamato is a Galaxy class ship, and the bridge virtually identical to the Enterprises.
- Narm Charm: The Nagilum entity looks...a bit goofy, and the late-80s CGI hasn't aged well, but it's fairly creepy in context, given how it looks almost human...but not quite.
YMMV / Star Trek: The Next Generation S2E2 "Where Silence Has Lease"