Heartwarming / The Adventures of Jimmy Neutron: Boy Genius
At the end of "Time is Money," Jimmy goes back in time to make sure Hugh doesn't invest his fifty dollars with McSpanky. After he comes back, Jimmy asks Hugh what he did end up spending the money on. Hugh's response?
Hugh: Well, son...I spent it on your mother's wedding ring.
Judy: (shows off the ring) And it was all the money your father had in his name!
Sheen admitting to his father that he loves him much more than he does Ultra Lord in "El Magnifico". Considering how rare it is to see Sheen being emotional, that's quite an achievement, especially since he just found out his father had lied to him.
After Jimmy had been shunned by the rest of his family, especially Aunt Amanda, throughout most of "Clash of the Cousins", hearing her call Jimmy the good nephew after Baby Eddie is outed, followed by the rest of the family cheering, is beyond satisfying.
"Make Room for Daddy-O" is essentially about 20 minutes of Jimmy learning that he really does care about his dad even if he is a nitwit. Highlights include Jimmy looking at photos of himself and his dad bonding, Hugh struggling to fight his new cool personality to save his son, and Hugh and Jimmy doing the duck dance at Father's Day Follies even though Jimmy was embarrassed by it in the episode's beginning.
In "Stranded", Cindy admitting that in all honesty she actually considers Jimmy to be a cool person is pretty touching, reinforced by the fact that it's practically the only episode in which she lowers her personal guard and opens up to another person (and the dialogue between the two becomes noticeably more serious and less comical). Later it turns downright heartbreaking when she almost bursts into tears while begging Jimmy to stay on the island with her forever; you can't help but feel sorry for the girl.