Doorway to Destruction Part 1 & 2
- Ross' reason for joining the team.
- The Agents of S.M.A.S.H. transforming into Wendigos. Despite Hulk's best efforts to help his teammates fight the curse, it was all for nothing as he falls victim to the curse as well. Thankfully Wolverine was there to save them at the last second.
Into the Negative Zone
- Hulk's heart-broken rage towards the Leader apparently killing his team and Ben Grimm in "Into the Negative Zone".
- Deathlok is a pretty tragic figure. He's lived his entire live in a horrible future where humanity is on the brink of extinction. He notes that the main reason he went to the past, aside from stopping the Skrulls from destroying the planet, was to see the sunlight and the beauty of Earth before it was all taken away.
- Made even more heart-wrenching when his cybernetic contact informed him that his mission failed. His last resort? Killing himself by self-destructing his body to blow up the Skrull ship, and he was happy to do this knowing that he wouldn't have to live through the horrible events that the future holds. Damn.
Monsters No More
- Watching the Hulk's reputation get thrashed thanks to the Agents of C.R.A.S.H. in "Monsters No More". It gets so bad Hulk tries to pull a Heroic Sacrifice to prevent the base reactor from destroying the townHulk: (to the other Hulk's) The world needs you more than it needs me!
Planet Leader Part 1 & 2
- We learn Skaar grew up an orphan with no memory of his real parents. Despite this he loved the kind family that adopted him very much and did his best to protect them. Sadly The Leader appeared and not only conquered Sakaar, he made Skaar a brainwashed slave/enforcer when he tried to stop him.
Planet Hulk Part 1 & 2
- The "Planet Hulk" two-parter had a couple.
- Hulk losing his temper again, and nearly throwing the Leader out the airlock for almost killing his family (again).
- Ego the Living Planet, while not exactly the type to route for, is fairly sympathetic in the season two premiere. Not only did he keep his promise not to harm other worlds, but he was willing to die in order to kill Galactus with the Kree cosmic bomb attached to him, and because no one in the universe loved him (other than the Hulks). Poor guy.
- Watching the Hulks slowly succumb to their greatest fears in "Fear Itself" is horrifying and depressing. But when She Hulk supposedly freezes to death, the reactions from the others really sell the pure horror of losing a loved one.
- Just about all of "Banner Day", one of the saddest Hope Spot episodes ever.
Days of Future Smash: Smashguard
- While watching the alternate timeline versions of Thor and Loki getting along in "Days of Future Smash: Smashguard" is heartwarming. It's sad that the "real" Thor and Loki can't get along at all.
- Young!Loki, when he learns the truth of his parentage.