Two come to mind, but
TNG: "When The Bough Breaks"
Season one was all over the map, going from adventure fare to family fare to seedy-strip-club-at-the-outer-edge-of-town fare, but this episode tries to meld in the (stupid idea of putting all the families on the flagship that will be first to be sent out into war zones and stuff) with those atypical things that go bump in the night.
There is a certain charm in this episode.
The idea that kids will evolve to the point they can learn calculus at such a young age is a laudable one. But why bother when computers can do all the work and more? Tell that to the
nonagenarian who shamelessly berates a 15 year-old in public who can't seem to figure it out that if a computer can do it, why learn it when there will be other things to learn that the mechanized-tool-used-to-supplant-human-labor will do? (Oh, no worries, it's a
lot more complex as that, of which yon discssion goes well beyond the scope of this episode, and other sci-fi stories that take various aspects of the concept to play with them like sculpture clay... that said, Harry's dad does cover it by saying how everyone needs a
basic understanding of it, not in-depth... without that line, the episode would be far worse...)
(yes, I agree that the music is surprisingly corny...)
The special effects were given a mini documentary in a tv show. I don't remember which, it may have been Reading Rainbow, but for good reason - the reveal of the power source is surprisingly authentic in appearance despite the visual trickery used to create it (which was made with much and amusingly smaller items..
The Custodian has verbiage and even visage not unlike Zen from Blake's 7.
It's a little on the nose and highly oversimplified, and limited to contemporary-80s ecological issues, but is not too bad.
My only real complaint is that they think that stealing seven kids will repopulate their entire civilization. The genetic pool is too small, and more importantly the episode doesn't try to sell a sense of greater scale as even "Show me where the Enterprise kids are,
Zen Custodian" and this teeny tiny map appears showing where the lot of them are. Okay, so is this then really a super-small civilization?
Also, and I wish I noticed one issue of particular and much mirth (adding link below), Picard is trying to save the kids even though he dislikes them more than how much kids hate eating real food (as opposed to kids 1000 years ago who'd have no clue on all the candy freely available...) and as such is probably quietly wishing he could do more to help the Aldeans...
(Seriously, at 3:21, but the whole thing's a hoot... though at 3:08, modern sci-fi sometimes puts in the 4th wall jokes before the audience can think it up. Sorta like calculus...)
What's left:
TOS: "Mudd's Women"
TOS: "What Are Little Girls Made Of?"
TOS: "Miri"
TOS: "The Menagerie, Part I
TOS: "The Mengaerie, Part II"
TOS: "Shore Leave"
TOS: "The Return Of The Archons"
TOS: "This Side Of Paradise"
TOS: "The Alternative Factor"
TAS: "Beyond The Farthest Star"
TAS: "One Of Our Planets Is Missing"
TAS: "The Lorelei Signal"
TAS: "The Survivor"
TAS: "The Infinite Vulcan"
TAS: "Once Upon A Planet"
TAS: "Mudd's Passion"
TAS: "The Terratin Incident"
TAS: "The Time Trap"
TAS: "The Ambergris Element"
TAS: "The Slaver Weapon"
TAS: "The Eye Of The Beholder"
TAS: "The Jihad"
TNG: "Code Of Honor"
TNG: "Lonely Among Us"
TNG: "Hide And Q"
TNG: "Too Short A Season"
DS9: "A Man Alone"
DS9: "The Passenger"
DS9: "The Storyteller"
ENT: "Unexpected"
ENT: "Terra Nova"
ENT: "Civilization"
ENT: "Fortunate Son"
ENT: "Cold Front"
ENT: "Fusion"
ENT: "Rogue Planet"
ENT: "Oasis"
ENT: "Detained"
ENT: "Desert Crossing"
ENT: "Shockwave, Part I"
DIS: "Context Is For Kings"
DIS: "The Butcher's Knife Cares Not For The Lamb's Cry"
DIS: "Choose Your Pain"
DIS: "Si Vis Pacem, Para Bellum"
DIS: "Into The Forest I Go"
DIS: "Despite Yourself"
DIS: "The Wolf Inside"
DIS: "Vaulting Ambition"
DIS: "What's Past Is Prologue"
DIS: "The War Without, The War Within"
DIS: "Will You Take My Hand?"
ST: "Runaway"
ST: "The Brightest Star"
ST: "The Escape Artist"
PIC: "Remembrance"
PIC: "Maps And Legends"
PIC: "The End Is The Beginning"
PIC: "Absolute Candor"
PIC: "The Impossible Box"
PIC: "Broken Pieces"
PIC: "Et In Arcadia Ego, Part 1"
PIC: "Et In Arcadia Ego, Part 2"
PRO: "Dream Catcher"
PRO: "First Con-tact"
SNW: "The Serene Squall"