Hiro's jealousy of Karmi's internship at Sycorax leads him to intern at Krei Tech.
Professor Granville becomes increasingly pushy with her suggestions for Big Hero 6 as she helps them try to figure out a mysterious series of food-related burglaries.
Hiro and Fred enlist Karmi to find out what Liv Amara is doing to cure Orso Knox, the man who was mysteriously turned into a monster.
Aunt Cass sets Hiro up with 14-year-old Megan which leads him to wonder if he is missing out on being a normal kid. Big Hero 6 must deal with an upgraded High Voltage.
Honey Lemon sets out to cure Globby and make him human again. However, Big Hero 6 must now face a new different evil glob-like villain.
When Honey Lemon finds out she can return to her dorm, Go Go realizes she doesn't want Honey Lemon to move out. Big Hero 6 look to stop a secret underground racing league.
Hiro and Go Go accompany Krei to the woods to deal with Nedd Ludd, however they run into the monster of legend, the Hibagon, along the way!.
When mysterious but adorable creatures called Mayoi suddenly appear in San Fransokyo, Hiro is convinced that they're part of some nefarious plot by Liv Amara.
Big Hero 6 attempt to thwart a bank robbery and are defeated by Supersonic Sue, a old school roller-skating villain.
Upon discovering Baymax's inherent abilities to detect if a person is lying, Hiro attempts to use Baymax to uncover proof of Liv's evil doing.
Hiro is forced to write a story for his class and decides to write about Big Hero 6. Strange versions of Noodle Burger Boy attack the team.
Karmi and Hiro team up to help treat someone overrun with genetically engineered parasites. Big Hero 6 must fight a city being attacked by monsters.
Big Hero 6 must continue to fight off a city overrun with monsters as Liv's plot comes to its dramatic climax.
Fred's bad luck threatens his safety. Megan tells Hiro that she's trying to uncover the true identities of Big Hero 6 for her school's newspaper.
Intent on becoming the toughest fighter in San Fransokyo, professional mech-wrestler El Fuego decides he must beat the strongest challenger he can find: Baymax.
Nega-Globby begins to take control of Globby's body to cause chaos around the city, turning Globby from an adored hero to a wanted criminal overnight.
Now fugitives, Big Hero 6 lays low as the SFPD searches for them. A new villain named Hardlight shows up hoping to challenge Big Hero 6 to a real-life video game duel.
When Hiro finds a wrapped present in the closet, he assumes it's from Aunt Cass and takes it in order to figure out what it is. However, after a mix-up, the present becomes lost and Hiro enlists the Big Hero 6 team to track it down.
Momakase blackmails Hiro into helping her steal a mysterious item from Yama's safe, threatening to tell Chief Cruz Big Hero 6's secret identities if he doesn't help her.
Circus acrobat and physicist Sirque steals a secret project from Krei and uses the technology to commit thefts all over the city.
Fred's invisibility function on his suit glitches during patrol.
A new villain calling himself Major Blast appears in the city and targets Fred; the other members of Big Hero 6 try to figure out who is behind the Major Blast mask.
Supersonic Stu busts his grandmother, Supersonic Sue, out of prison; at school, Professor Granville asks Wasabi, who fears public speaking, to sub for an absent teaching assistant.