Duckman/Heartwarming

Happens more often than you might think.. "Past!Duckman: …maybe I don't need to know any more than that."
 * The Indian casino episode.
 * "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. When Past!Duckman asks if he and Beatrice will grow old together, Present!Duckman tells him the truth: "You're gonna love her until the day you die."


 * "Ajax and Ajaxer" ends with a dedication to the late Dana Hill.
 * The ending of the very first episode qualifies as one.