* When Dexter learns that pirates kidnapped his sister (they believed she was a mermaid due to her swimsuit), he goes straight to the pirate ship and reveals his GiantMecha, which he had intended to keep secret, to save his sister, even though it would be easier for him if she were out of the picture.
* In a weird way, the ending to "Beard to Be Feared", even though it's had some MemeticMutation:
-->'''Action Hank''': "It doesn't matter if you have the beard on the outside, as long as you got the beard on the inside."
* The first half of "[=LABretto=]" is really nice ''and'' funny, and then the rest is just {{funny|Moments}}.
* The ending to "Dee-Dee's Tail". "Run free, Dee-Dee!"
** Made even better by the fact that this one of the few genuinely happy endings in the series.
* Dexter's duet with [[Music/PaulWilliams his piano teacher.]] Also doubles as CrowningMusicOfAwesome, because it's a sweet song.
* Monkey getting Simian to do a HeelFaceTurn by offering him a banana.
** Also, his memories with Agent Honeydew.
* Koosalagoopagoop ''finally'' being accepted in The Land of Koos. The TastesLikeDiabetes atmosphere only ''added'' to the cuteness.
* The ending of "Sun Surf and Science" where Mandark befriends the surfer dude.
** Also, him trying to save Dee-Dee.
* Even though it's an UnCancelled episode, the story of how Dexter's mom and dad met in the 80's is pretty adorable.
* In the quiz in episode 20 the final question is to identify each others favourite thing in the world. Dexter's is his lab but Dee-Dee's favourite thing? [[spoiler:Dexter.]]
* Dexter's and his family pulling together to defeat the {{Kaiju}} monster in the episode "Last But Not Beast" was surprisingly touching.
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