When Ms. Beasley selects Eugene McGillicudy and his nemesis, Meredith Mooney, to represent their class in the spelling bee, Eugene practices hard to become the best speller in the second grade. Soon he realizes that Captain Awesome will need to use his superspelling powers to stop "bad guy" Little Miss Stinky Pinky from taking home the shiny gold trophy.

When a sinister substitute teacher takes over their class, it is up to Eugene and the rest of the Sunnyview Superhero Squad to find Ms. Beasley and foil the sub's plot.

As Halloween nears, Captain Awesome and Nacho Cheese Man set out to protect Sunnyview from monsters but when they encounter what may be a real haunted house, they suddenly remember they have homework to do.

Eugene McGillicudy stands up for Sally Williams, the new student at Sunnyview Elementary, and then discovers that they both like an orange cat named Mr. Whiskersworth and the comic book super hero, Super Dude.

Captain Awesome to the rescue: When second-grader Eugene and his family move to a new neighborhood and he starts at a new school, he has a chance to bring out his superhero alter ego, Captain Awesome, to find the kidnapped class hamster. Captain Awesome vs. Naco Cheese Man: When second-grader Eugene's favorite comic book goes missing, he blames his best friend Charlie even though he has no evidence. Captain Awesome and the new kid: Eugene McGillicudy...