* CultClassic: The show is fondly remembered in Argentina, to quote: "it was the PowerRangers of our generation!"
* EnsembleDarkhorse: Alien Baltan, leading to many reappearances in other shows, and becoming one of the most iconic and famous villains in the series. Same with Gomora, who got his own show.
* EarWorm: That theme song for Ultraman is quite catchy.
* GenreTurningPoint: It's difficult to overstate just how much this show rebuilt and codified the {{Kaiju}} genre. Whereas before, a giant monster coming out of the sea to wreck up the place would be like a typhoon or hurricane: unstoppable, and the little humans scurrying away from it could only hope to rebuild afterwards or put up token resistance. The cost of stopping one would be horrendously high Film/{{Gojira}} or worryingly public (Film/KingKong), requiring military deployment. From ''this'' show onwards, it became entirely believable that those little humans could fight back on their own terms, and do it [[MonsterOfTheWeek once a friggin' week]] at that. Oh, and the big guy on Earth's side - the idea that Earth could have external, fairly long-lasting help from elsewhere - is also a nice change of pace.
* SugarWiki/HeartwarmingMoments: The episode "The Monster Graveyard".
* HellIsThatNoise: Alien Baltan's laugh[[note]]FWO FWO FWO FWO... MUO-FWO FWO FWO FWO FWO...[[/note]], which is so distinctive that it has a high chance of resonating inside viewers' heads for eternity. It's even this trope ''in universe''.
* {{Moe}}: e.g., "Pigmon"
* {{Macekre}}: The English dubbed version of the original Japanese dialogue is not nearly the worst offender, but the differences are definitely noticeable.
** BCI Eclipse's DVD releases of the series, thanks to having the uncut episodes, show at which points the show was or wasn't dubbed - a Japanese TV episode is a couple minutes longer than an American episode, so where there were undubbed moments, the dialogue just ''switches back to Japanese, and the subtitles come on.'' Whether it's ''incredibly'' distracting or just ''really'' distracting depends on whether or not you know why it's happening.
* NightmareFuel: Dada and the Mummy ''will'' have you looking behind your back when you're alone in an office building...
** NightmareRetardant: ...until you imagine Muramatsu - not an especially big guy - ''tackling'' Dada to the ground and not even losing any momentum in the process. And locking him out, too.
* ShoutOut: Hayata using a spoon instead of the Beta Capsule (he was eating curry when the call came in) is possibly the inspiration for TheTick using "Spoon!" as a battlecry.
* SpecialEffectFailure: Occasionally. It was made in 1966, and not everything's going to look good after 50 years.
* SugarWiki/VisualEffectsOfAwesome: Put it this way - it's 1966, and most of the crazy things you see in a typical episode would have looked good in a theatrically-released film. This was a ''half-hour kids' television show'', filmed in color at a time when there were barely enough black-and-white [=TVs=] to watch it on. They could've fudged things here and there, but ''didn't'', and wow does their effort show even nearly 60 years after the fact.
* TearJerker: The episode of Jamila.