* Meta example: Christine Cavanaugh, Chuckie's original voice actor, died in 2014 of Leukemia. Shortly after news of her death broke, ''Series/The90sAreAllThat'' on [=TeenNick=] aired a marathon of Chuckie episodes in her memory.
** Similarly, Joe Alaskey, the second voice of Grandpa Lou, died in 2016 from cancer.
** His first voice, David Doyle, died midway through the series. The episode "Lady Luck" ends with a dedication to him.
** In August 2016, Jack Riley, the voice of Stu Pickles, died from pneumonia.
* "I Remember Melville" is easily one of the most heartbreaking episodes in the series, featuring concepts of death being explained as Chuckie goes through the loss of his pet bug, Melville. On paper it sounds like a silly idea, but the execution of the episode is nothing less than impressive. It's actually not that sad until Chuckie starts crying over how pudding reminds him of Melville. Poor freaking Chuckie.
* "Spike Runs Away". Tommy and Chuckie crying over losing Spike is just sad, especially to anyone's who has ever lost a pet. Thankfully, it gets better.
* While the episode was intended as NightmareFuel, "The Mysterious Mr. Friend" is one of the most depressing episodes in the series. This toy clown named Mr. Friend merely wants to play with Tommy and his buddies, but creeps them out unintentionally, and he doesn't know better. The poor guy ends up killed in the end.
* The crying scene in the episode where Angelica thought she was going to move away.
* The Mother's Day episode, which explains what happens to Chuckie's biological mom: [[spoiler: She died of an [[SoapOperaDisease unexplained but terminal illness.]] It culminates with [[DeadManWriting a letter the dying woman wrote to her son for him to read when he was older.]]]]
** It's natural to feel bad for Chuckie, but don't forget Chaz. He keeps her belongings stored away and doesn't talk about her much. It's clear that up to that point in the series he wasn't yet able to get over what happened to her. The scene where Chaz finds that Chuckie has gotten a hold of some of her stuff is downright heartbreaking.
** In hindsight, many of Chaz's interactions with Chuckie come off rather poignant as a result, as it is blatant how emotionally dependent he is on him due to the loss of his wife. The fact both are {{Adorkable}} {{Nervous Wreck}}s only punctuates it.
* In "Together At Last," the scene where Phil thinks Spike ate Lil. He opens his mouth and says, "Lil, I'm sorry!"
* The ''Literature/FlowersForAlgernon'' WholePlotReference episode where Chuckie gets an experimental treatment to get rid of his allergies [[spoiler: only to have them come back]].
* The "All Growed Up" special where it shows them as preteens. The whole special has a certain air of maturity and the pressures of growing up and experiencing new things. It then culminates at the concert scene, where Tommy and Angelica duet with some big popstar over a ballad that then flashes back to the series as a whole, showing scenes from multiple episodes. The creators did, indeed, write the special as an emotional look at the series.
* Acorn Nuts and Diapey Butts, the scene at the cemetery.
* The movie's climatic scene involving monkeys, rain, and bananas.
-->'''Tommy:''' Dil wants monkeys, monkeys want their nanners. EVERYBODY GETS WHAT THEY WANT!
** Tommy's HeelRealization straight afterwards as Dil starts crying, albeit for once not usual infant screaming, but genuine terrified sobbing. He drags Dil into shelter and dotes over him until he falls asleep.
* The plane trip in the second movie. Chuckie sees all his friends together with their respective moms, and he's sad because he's the only one without a mom. At one point, he even looks out the plane window and sees clouds shaped like himself and his mom together. The song only makes the scene sadder. ''[[http://www.youtube.com/watch?v=p6Y5pkg983Q I want a mom that will last forever, I want a mom to love me whenever...]]''
** Before that, the scene where all the kids are dancing with their mothers at Lou and Lulu's wedding reception. And both Chuckie and Chaz watch with concealed envy. His line to the "Bob-Father" is truly shattering.
--> '''Chuckie''': ''(excited)'' Angelica, Wait Angelica I think I Know what I want to wish for. I'd kinda like to have a new Mommy.
--> '''Angelica''': Sorry Finster that games over, besides I'm wanted on the dance floor.
--> '''Chuckie''': ''(sighs dejectedly)'' But that's my wish...
** All this is set to the heartbreakingly beautiful song "When You Love"
*** The reprise of the song however stands as the prime example of a CrowningMomentOfHeartwarming for the entire franchise as Chuckie finally dances with his new Mommy.
** Also Chuckie's emotional breakdown in the warehouse after discovering what kind of woman his soon to be new "Mommy" really is.
* Chuckie spending an entire episode trying to release his "sea monies" into the ocean, only to become heartbroken when he actually pulls it off. Knowing that they probably died ten minutes into the episode doesn't make it any less sad to hear him call out good-byes to them.
* Anyone who grew up with this show and loves toys along with cute babies are bound to cry during ''The Curse Of Reptar's'' ending (All Grown Up). Basically [[spoiler: It has a flashback at the time they were still babies and playing with Reptar. The end of the flashback has them sleeping under a tree with the Reptar doll with Tommy holding the doll and sucking his thumb. Cut flashbacks, and eventually grown-up Tommy finds the now rusty Reptar, taking it back inside to keep in his box.]]
* "Regarding Stuie" manages a pretty impressive MoodWhiplash, ending an episode-long string of [[CrowningMomentOfFunny Crowning Moments of Funny]] with a TearJerker climax. In a nutshell: Stu gets a head injury that briefly lets him communicate with the babies, but also screws up his memory and makes him ''act'' like a baby. "Stuie" then spends most of the episode wearing a diaper and palling around with Tommy and the gang. At first, Tommy is thrilled to have an adult-sized baby as a friend, but it all falls apart when he realizes that even the coolest baby can never replace his dad--and he seriously believes that he'll never have his dad back. The climax has Tommy silently weeping while looking at old pictures of himself playing with his dad, with "Stuie" (who still can't acknowledge the fact that he's Tommy's father) coming in to comfort him as he realizes how much Tommy misses his "daddy".
** Keep in mind "Stuie" essentially performed a HeroicSacrifice just so Tommy could have his dad back.
* If you take in the interpretation that Charlotte had a miscarriage in "Angelica's Worst Nightmare" (instead of misreading the pregnancy test), the episode suddenly becomes this.
** In the same episode, Angelica wakes up from a nightmare involving her newborn baby brother terrorizing her and her parents ignoring her. When her father goes to see her, she starts breaking down and telling her dad that she doesn't want a new sibling and to be ignored like she was in her nightmare. Her father reassures her that he and Angelica's mother will always love and care for Angelica since she is their first child and she will never ever be replaced.
* Everything about [[http://rugratonline.free.fr/strips/rg050999.gif this short comic]].
-->'''Angelica:''' (to Chuckie) [[spoiler:That's "[[{{Malaproper}} break your mother's back]]", you st... ''[[ExplainExplainOhCrap oh]]''.]]
** Also a CrowningMomentOfHeartwarming; this is a situation where [[EvenEvilHasStandards even ANGELICA couldn't bring herself to say anything bad to Chuckie]] and instead [[spoiler:stands there watching the sky with him]]. The last lines WILL bring you to tears.
-->'''Angelica''': See anything yet, Chuckie?
-->'''Chuckie''': No. [[spoiler:[[CrowningMomentOfHeartwarming But I know she's watching]]]].
* During the Chanukah special, Grandpa Boris finds out that the only reason his old rival Schlomo was so wrapped up in his "fancy schmancy business" was because [[spoiler: Schlomo's deceased wife was not able to have children]]. The fact that the scene has no music underneath it really drives home the scene's magnitude.
* "Weaning Tommy" has an overzealous dentist convince Stu and Didi to wean Tommy from the bottle early. The result leaves Tommy miserable and depressed, becoming increasingly desperate for his beloved bottle and even having nightmares about it. Any parent that has had to deprive their child of something they love for their own good will know this shameful feeling.
-->'''Stu:''' I feel like a monster!
* The ''Babies in Toyland'' special has several moments:
** Tommy and the gang find themselves in Christmas Land's replica of Bethlehem, where they encounter a Baby Jesus figurine. They feel sorry for him because he has no presents, so they each give him the gifts they found on their journey to find Santa's workshop (Kimi's bell, Lil's ribbon, Chuckie's Christmas walnut, and Phil's ballet shoe). When they're done, the figure smiles (its face was neutral before).
** Lil's reaction to seeing Baby Jesus sleeping in "itchy hay" and ostensibly cold.
** Angelica's eventual attachment to Prancie, the little stuffed reindeer a fake Santa gave her.
** After having an ImagineSpot in which she realizes she's been mean, Angelica gives each baby a special gift, but forgets Dil. She immediately gives up Prancie for him. Tommy then offers her ''his'' present, since Angelica is now the only one without one.
** YMMV, but Angelica says a couple of times she's tried to be good all year. Of course, considering her attitude toward the babies, this isn't reliable. But she's clearly eager to see Santa and expects to get presents (whereas in ''The Santa Experience'', she was afraid of getting coal). The fake Santa she encounters quits, and blames her for it, leaving Angelica genuinely upset and confused. It really makes you feel Santa is a JerkAss, taking out hatred for his job on a three-year-old girl.
* ''The Rugrats Movie'' has one. Long story short, Tommy and the gang think that Stu, trapped in his flying invention, is a [[BuffySpeak "lizard," by which they mean "wizard."]] The babies have been lost and intended to ask the "wizard" to get them home. But by then, Spike has [[DisneyDeath ostensibly been killed protecting the babies from a wolf.]] Tommy looks up and says, "We wish we had our doggy back." [[spoiler: Fortunately, Spike does survive and return.]]
* During ''Mother's Day'' Tommy reveals the first time he saw his mom... was when he was in an incubator. While it is heartwarming at the ending seeing poor Tommy trapped in a glass tube, connected to machines, is very sad. Even worse when he talks about being alone and scared. This might very well be his first memory: alone, frightened, hurt, and not knowing what is going on. He didn't even realize Didi was his mom... he was just glad he wasn't alone.
** For Didi too. She can't even hold her baby... all she can do is stare at him and hold his hand.
----