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The episode "Flashback", the episode opens with a statue being erected to honor the heroes who died in the Dakota riots including Virgil's mother. Later Static and Gear see Ebon chasing a girl who turns out to be a bang-baby with the power to move through time. They rescue her and she decides to become a superhero to use her powers to help people. Static convinces them to go back five years to the riots in Dakota to save his mom. In the past Virgil meets his mom and tells her he is her son from the future. She says how proud she is of him. He warns to her stay put because she is in danger and she promises. Meanwhile Ebon kidnaps Timezone and steals a truck full of Big Bang gas to create an earlier Big Bang. Static and Gear stop him but Static sees his mother back to work pulling a Heroic Bystander before the remote Timezone uses shorts out and they are pulled back to the present. Virgil runs home and realizes that his mother still died in the riots. The kicker is, his dad tells him that on the night she died her coworkers heard her saying she was very proud of Virgil and kept referring to him as "my son, the superhero". It may also double as a Tear Jerker episode.
"Frozen Out" qualifies as well. While it may be par for the course for a Christmas episode, it is very touching, especially when the "villain" is just a little girl lost.
Static hugging poor Permafrost, and him wiping away a tear at the end are just two touching moments from said episode.
There's also the end of the episode, where the various people in town get together for a massive holiday celebration, even though they're all of different religions. Cheesy? Possibly. But it's still very sweet! Especially when one scene shows Richie's dad in the group (keep in mind that before his Character Development, he was a narrow-minded bigot who likely would have laughed at the idea of attending such a function).
Preacher: I want to tell you that, despite our differences, we all have in common certain basic human beliefs. Whether you are a disciple of Muhammad, a child of Abraham, or a member of the Body of Christ, you know that you are called upon to care for the needy and the poor. This great country of ours is so very blessed—yet for some, the blessings are out of reach. Therefore, it is our duty to offer them safe conduct through life's difficult journey. To be their ambassadors of compassion.
Then end of "Bad Stretch" where Adam shows up to apologize to a very angry Sharon is great. He shows up with a bouquet, and when Virgil points out it would be easier to face the Meta-Breed again instead of try to make up with his sister, Adam just smiles and says "Some things are worth it." Not chabby for the main official couple!
In "Kidnapped", it is extremely satisfying to see Robert Hawkins both deduce Virgil's identity as Static and then support him in his endeavors, especially after watching Virgil spend so much of the series maintaining a double life (and occasionally coming into conflict with his father as a result).