Happens more often than you might think... As [[FamiliarFaces CR put it]], because the show wasn't nearly as schmaltzy as shows like ''FullHouse'', the moments where the characters did something heartwarming [[OOCIsSeriousBusiness meant all that much more.]]
* The Indian casino episode.
* While it borders on AuthorTract, Duckman's pep-talk to America at the end of "America the Beautiful" fits.
-->'''Duckman''': There've even been times I've wanted to give up - but if I do, how can I expect things to ever get better? What kind of world would I be leaving my kids?
* "The Girls of Route Canal", in which Duckman tells his sons the story of how he met Beatrice.
* Near the end of "Cellar Beware", Duckman throws himself on top of a bomb -- and even though it didn't end up exploding, Duckman "sacrificing" himself ''willingly'' to protect his family tugs at the heartstrings a little.
* The end of "Sperms of Endearment", when Duckman and Bernice walk together in the park and engage in a venom-free exchange of their usual insults.
* After being driven to the brink by his various future-selves in "The Once and Future Duck", Duckman finds himself face-to-face with a past version of himself -- from the day of his wedding.
--> '''Past!Duckman:''' There are some things I-I gotta know! For instance - my marriage. Am I doing the right thing, marrying Beatrice? Do we grow old together?
--> '''Present!Duckman''': ''({{beat}})'' [[http://youtu.be/1DHb03sY1KY?t=18m16s You're gonna love her until the day you die.]]
--> '''Past!Duckman:''' ůmaybe I don't need to know any more than that.
* The episode "About Face" has Duckman falling in love with a 911 operator [[ArousedByTheirVoice over the phone]], staying with her and actually being ''honest'' about himself even after finding out that she's TheGrotesque, so hideous that even ''[[TastesLikeDiabetes Fluffy & Uranus]]'' are horrified. She eventually gets plastic surgery because she hates how hurt Duckman looks at others' reactions, and becomes the ''perfect'' woman... [[CruelToBeKind at which point he breaks up with her]], [[IWantMyBelovedToBeHappy realizing that he's completely beneath what she deserves]].
** Even more notable in that ''[[JerkAss Bernice]]'' even empathizes with Duckman's position.
* "Ajax and Ajaxer" ends with a dedication to the late Dana Hill.
* After Duckman reveals why he was such a jerkass to King Chicken as a child, they bond in King Chicken's rec-room/Duckman-murder-shrine. After so many implied years at each other's throats, for the truth to finally come out and for them to be able to be in a room at the same time, even if it involved copious amounts of alcohol and King Chicken having an affair with Bernice, was a nice development.
** [[spoiler:Too bad it didn't stick by the end of the episode, though...]]
* The ending of the ''very first episode'' qualifies as one.