Mayor for a Day / The Dog Craze of SummerMayor for a Day: Richardson Mole outbids Fred to be Mayor for a Day, much to his horror. With his new power, Mole begins to abuse Big Hero 6 by having them over at his office for insignificant issues. The team decide to ignore him, ironically when the Supersonics kidnap him in an effort to draw out Boss Awesome. They decide to team up with him to thwart Big Hero 6 instead and a fight in the streets ensues. Ultimately, the Supersonics flee while Mole is outed for his villainy. He pardons himself and flees, allowing Fred to take over as mayor for the day and getting his portrait put up and having kaijus become a transit service.
The Dog Craze of Summer: Granville approaches Hiro with dog-sitting for her; promising him payment if he fulfills his task. Her dogs, Curie, Fermi and Oppenheimer turn out to be a handful for him, despite Baymax reminding him to follow the guidebook given to them. Fermi runs away, resulting in Hiro getting his friends to take care of the other two. Eventually, Hiro gets Fermi back when Baymax finally consults the book. The dogs are returned to Granville, who pays him as promised, but Hiro is forced to give up the money to everyone, including Steamer for Oppenheimer taking his arm, for all the trouble he caused.