The Avatar State
- Aang has a nightmare about losing control while he's in the Avatar State and wakes up. He tells Sokka he has doubts about forcing himself into the Avatar State again and Sokka kindly tells him it's fine, and goes on to reassure Aang that no-one can make him do anything.
- Even though Zuko insults Iroh and implies that he's nothing but a jealous old man, Iroh still comes with Zuko when they join Azula, just to protect him.
The Cave of Two Lovers
- The end, when Aang sheepishly tells Sokka that he and Katara "let love lead the way." Even better when it was confirmed by Word of God what happened in the cave was in fact a First Kiss.
- Despite his later actions, Zuko is genuinely upset when he sees Song's burn scars. This moment seems to kick off the start of him realising that the war has hurt innocent people.
Return to Omashu
- The end, where Aang brings Tom-Tom back to his parents with no ill-feelings is pretty touching, but the music really drives it home.
- Tom-Tom being reunited with his parents. The mother's cry of "Tom-Tom!!"◊ as they turn around and see him, and Aang's smile◊ as he watches from nearby just makes you feel... Fuzzy. Like socks.
- The scenes where the prisoners give Aang advice on his relationship with Katara. Especially since, initially, the other prisoners seemed ready to beat the snot out of poor Aang (until the Gilligan Cut), and one of them actually starts crying in sympathy for Aang. WAFF for everyone!
- Zuko despite using his blue Spirit identity to mug and steal for food and money takes the time to buy his uncle a nice golden tea set.
- After Sokka recovers his Boomerang the Rough Riders stole:Sokka: Boomerang! You do always come back!
Sokka: Now come back, boomerang.
- Then just four episodes later...
- Sokka's love for his boomerang brings an enormous, genuine panic into the Grand Finale, where he is BARELY holding onto Toph, thousands of feet in the air. Two enemy soldiers are about to attack, so he hurls his boomerang at one and his "space sword" at the other. They both do the job, but neither comes back. Suddenly, the weight of the scene is so much more, because his beloved boomerang is gone forever. And then more soldiers approach, and Sokka's grip starts to slip...
- And then Suki comes back, which is just as heartwarming.
- Quite a minor example, but Zuko is about to take food from a couple, but he stops after seeing the woman is pregnant. And it really hits hard when you realize that the woman, who we see later, is pregnant with Hope. Sparing her life is what brings hope for Zuko's path to redemption and allows this baby to be born healthy, thus giving Aang hope to find Appa.
- Zuko going to rescue a boy that he barely even knows from some Earth Kingdom soldiers. Any doubt that there was good in him should have gone away right there. Then it turns into a Tear Jerker as he's run out of town for being a Firebender and the son of Ozai. It's also a hint to Zuko of just how much the rest of the world hates the Fire Nation, something he includes in his Calling the Old Man Out speech to Ozai.
- When Toph and Iroh are talking over tea. Iroh talks about Zuko. When Toph leaves, she says this...Toph: Oh, and about your nephew, maybe you should tell him that you need him too.
- ...made all the more touching because of Zuko and Iroh's Father/Son gap filling relationship.
- Despite Zuko and Iroh chasing Team Avatar all across the world in Book 1, when Iroh Is injured fighting on their side, Katara immediately offers to heal him.
- We're treated to a flashback of a younger Iroh playing happily with his son. It's clear just from the few seconds we see just how much of a loving, caring bond they had and how much better of a father Iroh was than Ozai ever could be.
- Zuko's clumsy, unsuccessful yet incredibly sweet efforts to take care of Iroh, and Iroh drinking the (unintentionally foul) tea that Zuko gave him, even after finding how bad it tastes.
- When talking about Azula, Zuko predicts that Iroh is going to say that because she's his sister, he shouldn't fight back. What does Iroh say? "No, she's crazy, and she needs to go down". Zuko may not show it, but one can tell he appreciates it. He's probably felt like the only person (besides his mother) who wouldn't enable Azula's cruelty. This must be the first time he feels someone's on his side for a change.
- Iroh teaching Zuko to use techniques from other nations to channel his fire and lightning bending. While its no surprise Iroh would support his nephew, it demonstrates that he's willing to trust Zuko with more of his personal secrets and that Zuko is ready to learn from the world instead of only the Fire Nation.
- Aang is taking a break from earthbending and is filling in that time by doing some more waterbending with Katara. He's in very low spirits after several struggles and expresses doubt over whether he'll be able to master the element of earth, but Katara, being the gentle and understanding Team Mom that she is, encourages him to keep going with some in-depth thinking.Katara: You know this block you're having is only temporary, right?Aang: I don't want to talk about it.Katara: You do realize that's the problem, don't you? If you face this issue instead of avoiding it —Aang: I know, I know, I know, I know! I get it, alright? I need to face it head-on, like a rock. But I just can't do it! I don't know why I can't, but I can't.Katara: Aang, if fire and water are opposites, then what's the opposite of air?Aang: I guess it's earth.Katara: That's why it's so hard for you to get this. You're working with your natural opposite. But you'll figure it out. I know you will. (picks up a reed) Think fast! (throws it at Aang, who cuts it in half with waterbending) Excellent. You have the reflexes of a waterbending master.Aang: Thanks, Katara. (bows) Sifu Katara. (Katara bows back)
- That last piece of dialogue there is a nice icing on the cake, as Katara was desperately wanting Aang to address her as that for a good chunk of the episode.
- Katara hugging Aang is in equal parts heartwarming and heartbreaking.
- Sokka grabbing Toph to guide her while they run away.
- The fact that neither Sokka, Toph nor Katara lash out at each other once throughout this episode. It would be perfectly understandable if they did, given the hopelessness of their situation, but the three of them are actually much more tolerant and cooperative with each other than usual. Especially when compared to The Chase, in this episode they don't have a single argument. It just goes to show that when the chips are down, Team Avatar sticks together.
The Serpent's Pass
- The scene when Aang gazes upon the face of the minutes-old baby and allows himself to feel for the first time in days. As he says to Katara afterward:Aang: I thought I was trying to be strong, but really I was just running away from my feelings. Seeing this family together, so full of happiness and love, it reminded me of how I feel about Appa and how I feel about you.
- And what really sells it is how Katara sheds Tears of Joy after he says that to her and is still doing so while they share a loving hug.
- Suki telling Sokka that she fell for a great guy who was funny and smart and brave. He needs her to spell out that she's talking about him.
- After an episode of Sokka worrying about Suki getting hurt, Suki admits that she came with them to protect Sokka. Awww. Followed by Sokka kissing Suki, making up for pulling away earlier in the episode and indicating he's recovering from his guilt over losing Yue.
- Iroh admiring baby Hope.
City of Walls and Secrets
- The two guards in the teashop don't hesitate to move to defend Iroh and Zuko from Jet. Even though Jet was right about them being firebenders, all they saw was an armed young man about to attack two workers for no reason. The only reason they don't intervene immediately is because Zuko beat them to it.
The Tales of Ba Sing Se
- Zuko's date with Jin. The scene where he lit all the lanterns with Firebending for her — risked discovery, death, so much — just to make her happy was very touching. Also, Zuko admitting that at the end, he did have a great time. He finally had one moment where he could experience real joy as a normal teenager.
- That entire episode, Iroh mourning his son, Momo mourning Appa. Iroh's story in particular, especially since Mako, the man providing his voice, had died around the time of the original airing.
- The end of the Toph/Katara segment. After being made fun of by some girls for her appearance (and dealing with them), Toph tries to say she doesn't care about how she looks, but can't keep from crying as she does so. Katara responds by sincerely telling her that she's pretty. Toph lights up immediately and responds with gratitude, a blind joke, and an affectionate punch.
- Pretty much all of Iroh's tale - except the end.
- During Momo's tale, he's been captured along with a gang of cats that were chasing him. Momo frees himself from the cage and starts to run off, but then stops and looks back at the cats...and then lets them free. The next scene shows them all on a rooftop, with one of the cats rubbing Momo affectionately in thanks. Awwww.
- And there's also a bit of heartwarming Fridge Brilliance. One of the cats takes the tuft of Appa's fur that Momo had been hanging onto, and runs with it. At first glance, one may think that the cats were tricking Momo, but the cat stops, turns, and places the tuft of fur right on Appa's footprint where he was captured. Momo just lies down with the tuft as the cats watch nearby.
Appa's Lost Days
- Remember that stolen sandbender ship that Team Avatar found in the desert? As it turns out, Appa sneezed that into the sand. If it hadn't been for that sand ship, Team Avatar wouldn't have found help. Even while he was kidnapped, Appa unintentionally saved our heroes' lives.
- The boy that pushes the straw so Appa can eat it, and then smiling when Appa escapes the circus. And according to Appa's point of view, the kid reminds him heavily of Aang, especially when he's so happy.
- Suki finds Appa, and her and her fellow Kyoshi Warriors selflessly make the effort of healing and feeding him, being very considerate with his pain as they restore him back to health. And then they take a stand so Appa can escape Azula.
- Appa's memories of a happy time in the old Eastern Air Temple, as well as the moment he and Aang bonded.
- Guru Pathik helping Appa with his inner pain and fear. Not to mention his helping Appa locate Aang.
- Appa's triumphant return when he is finally reunited with the Gaang at the end of Lake Laogai, and everyone hugs him.Aang: I missed you, buddy.
- Zuko choosing to free Appa. Even more so when, out of all the people who were kind to Appa or aided in his quest to find Aang during his lost days, Zuko can add himself to the list.
The Earth King
- The Earth King warms up to Aang because Bosco likes him and recognizes him from the party.
- Although it's to convince him to come with them, Aang letting the Earth King ride Appa is a sweet gesture.
- When Aang opens the Air Chakra, which deals with love, and is blocked by grief. Aang's vision lays out all his grief in front of him; he sees an endless crowd of Air Nomads, with Gyatso at the front. As Pathik narrates the meaning of the chakra, they vanish, one by one, into a huge cloud.Pathik: Love is a form of energy and it swirls all around us.
[The Air Nomads vanish into the cloud, which begins to swirl and gradually take new shape]
Pathik: The air nomads' love for you has not gone from this world.
[The cloud slowly takes the shape of a face]
Pathik: It is still inside of your heart. And has been reborn in the form... of new love.
[The cloud finally forms into the shape of Katara's face, accompanied by flashbacks to happy moments Aang has had with Katara]
Pathik: Let your grief flow away.
[Cut back to the real world; Aang has tears flowing down his face, but also a gentle, happy smile.]
- All of the Water Tribe soldiers greeting Sokka cheerily when they see him. Follwoed by him greeting his father.
- What makes the following exchange so heartwarming is how Sokka's natural Deadpan Snarker attitude just falls and you see him genuinely joyful for the first time in the series.Hakoda: Sokka.
Sokka: Hi, Dad.
(Cue embrace and many tears from the audience◊)
Hakoda: Bato, get these mines loaded up. The rest of you men, prepare for battle!
Sokka: Uh, what should I do, Dad?
Hakoda: Weren't you listening? I said the rest of you men, get ready for battle!
- Iroh smiling happily after Zuko recovers from his Angst Coma.
The Crossroads of Destiny
- A distraught Katara imprisoned in the Crystal Catacombs lashes out at Zuko and then starts crying. When she mentions that she lost her mother, Zuko expresses sympathy, telling her that it's something they have in common. After calming down, Katara then apologises for yelling at him.Katara: It's just that for so long now, whenever I would imagine the face of the enemy, it was your face.Zuko: My face? I see. (touches his scar.)Katara: No, no, that's-that's not what I mean.Zuko: It's okay. I used to think this scar marked me. The mark of the banished prince, cursed to chase the Avatar forever. But lately, I've realized I'm free to determine my own destiny, even if I'll never be free of my mark.Katara: Maybe you could be free of it.Zuko: What?Katara: I have healing abilities.Zuko: It's a scar, it can't be healed.Katara: This is water from the Spirit Oasis at the North Pole. It has special properties, so I've been saving it for something important. I don't know if it would work but...
- Toph remembers Iroh from their conversation in The Chase and calls him an old friend.
Iroh: Perfection and power are overrated. I think you were very wise to choose happiness and love.
- Aang also trusts Toph's judgement enough to ask Iroh for advice himself concerning his conflict between his love for Katara and his mastering of the avatar state.