History Heartwarming / DextersLaboratory

** A small but endearing detail: when Dexter tried visualizing himself as a triceratops, his narration and acting were based entirely on his encyclopedic knowledge. Even so, he does a stellar job and Dee Dee tells him he aced it. He could do it while still being Dexter, he didn't really need to renounce to his identity. [[TearJerker/DextersLaboratory It's too bad, really...]]

* Most of the episode "Snowdown" is about Dexter's dad teaching him how to snowball fight to defeat DeeDee who's pelting him with snowballs. When he finally does manage to score a hit on her, however, she sincerely congratulates him on it, earning a sincere thanks from Dexter. Despite Dad's melodrama, Dee Dee ultimately just wanted to play in the snow with her brother, and Dexter was fine with that once he figured out how.

* Koosalagoopagoop ''finally'' being accepted in The Land of Koos. The TastesLikeDiabetes atmosphere only ''added'' to the cuteness.

* The first half of "[=LABretto=]" is really nice ''and'' funny, and then the rest is just SugarWiki/{{funny|Moments}}.

** A small but endearing detail: when Dexter tried visualizing himself as a triceratops, his narration and acting were based entirely on his encyclopedic knowledge. Even so, he does a stellar job and Dee Dee tells him he aced it. He could do it while still being Dexter, he didn't really need to renounce to his identity. It's too bad, really...

%% * The first half of "[=LABretto=]" is really nice ''and'' funny, and then the rest is just SugarWiki/{{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 SugarWiki/AwesomeMusic, because it's a sweet song.

%% ** Also, his memories with Agent Honeydew.

%% * Dee Dee's pep talk to Dexter in "Bar Exam".

* Monkey getting Simian to do a HeelFaceTurn by offering him a banana.

* In "Spacecase", Dexter allows aliens to abduct his sister, but both guilt and the uncomfortable silence in the fact that he truly misses her leads him to Lock-And-LoadMontage, creating a suit and go into space to get her.

* In "Hamhocks and Armlocks", when Dad runs afoul of a nasty truck driver Earl(he accidentally broke his undefeated record in arm wrestling by distracting him), Earl first demands he arm wrestle him so he can take revenge. When Dad refuses, Earl smashes the car to provoke him. Dad refuses, even telling Dexter violence is not the answer. However, when Earl slams the restaurant door in Mom's face, Dad gets furious, entering and saying he can treat HIM(Dad)the way he wants, but never NOT hold a door open for a lady, especially his wife. He immediately challenges Earl, ready to put the hurt on him.

* The first half of "[=LABretto=]" is really nice ''and'' funny, and then the rest is just SugarWiki/{{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 SugarWiki/AwesomeMusic, because it's a sweet song.

** Also, his memories with Agent Honeydew.

* Dee Dee's pep talk to Dexter in "Bar Exam".

* Dexter's duet with [[Music/PaulWilliams his piano teacher.]] Also doubles as CrowningMusicOfAwesome, because it's a sweet song.

* The first half of "[=LABretto=]" is really nice ''and'' funny, and then the rest is just {{funny|Moments}}.

* In "Dee Dee Locks and the Ness Monster," Dexter's mom asks Dexter to read to a sick Dee Dee, who's genuinely touched by the gesture. As Dexter begins to read to her, Dee Dee, smiling weakly, cuddles up to him and folds her arms over his head. A sweet image.

* Dexter's elation at seeing his sister again in "Oh, Brother", especially since turning his sister into a brother had the unforeseen side effect of the boy genius becoming TheUnfavorite to his family.

* In its own weird way, Dee Dee dyeing Dexter's hair blonde in "The Blonde Leading the Blonde" as well as Dexter thanking Dee Dee for her actions. While Dee Dee mainly did it to prove the belief that blondes have more fun, it's nice that she chose to proof the theory in a way that allowed her brother to have a nice day and that Dexter was grateful for his sister's selfless decision.

* In its own weird way, Dee Dee dying Dexter's hair blonde in "The Blonde Leading the Blonde" as well as Dexter thanking Dee Dee for her actions. While Dee Dee mainly did it to prove the belief that blondes have more fun, it's nice that she chose to proof the theory in a way that allowed her brother to have a nice day and that Dexter was grateful for his sister's selfless decision.