Hiro thinks Baymax is lost forever, until he finds the chip that Tadashi designed to create Baymax. Hiro immediately gets to work rebuilding his friend.

Go Go and Honey Lemon quickly clash when they become roommates. Meanwhile, when a thief steals Honey Lemon’s chem-lab purse, it accidentally turns him into a monster.

When Aunt Cass stumbles into an underground cooking competition, she thrives and becomes addicted to the excitement.

Hiro, Fred, and Baymax follow GoGo into the mysterious Muirahara Woods where they get lost and everything electronic strangely fails including Baymax.

After Aunt Cass nearly discovers Hiro's secret membership in the Big Hero 6, Hiro tries to set her up with someone to distract her.

Although he is obviously ill, Hiro refuses to listen to his team-mates and Baymax and only watch from afar as they fight the mercenary team Mad Jacks.

Wasabi's need for order clashes with Hiro's chaotic work style when they collaborate on a school project.

Hiro becomes frustrated when he's deemed too young to attend a science workshop hosted by SFIT's most famous alumni, Dr. Trevor Trengrove.

Hiro decides to upgrade himself with super strength.

Hiro invents a tiny robot, Mini-Max, to supervise and be a sidekick to Fred while the rest of the team is in class.

To try to prove Yama is behind a mysterious crime spree, perpetrated by tiny bots, Hiro is drawn back into the illegal world of bot-fighting.

Professor Granville becomes increasingly pushy with Big Hero 6 as she helps them figure out a mysterious series of food-related burglaries.

Hiro and Fred enlist Karmi to find out what happened to Orso Knox, the man who was mysteriously turned into a monster.

Big Hero 6 must stop a secret underground racing league.

When Hiro and Go Go accompany Krei to the woods to deal with Nedd Ludd, they run into The Hibagon, a legendary monster.

Upon discovering Baymax’s ability to detect if a person is lying, Hiro attempts to use him to uncover proof of deceit.

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 her family's knives from Yama's safe.

Fred's invisibility function on his suit glitches during patrol.

Chief Cruz and the police get the upper hand in their battle with both villains and Big Hero 6 when they begin using Buddy Guardians, powerful new robots produced by Krei Tech.

Big Hero 6 face their greatest challenge as Obake unleashes his plan on San Fransokyo.

Hiro becomes demoralized when his latest school project fails spectacularly; the team must take on the incompetent villain, Globby.

Crazy game show host Mr. Sparkles threatens to hurt Hiro's cat Mochi to force Go Go to join a game. But she is very afraid of public appearances.

Honey Lemon takes art classes at a rival school.

Karmi posts Big Hero 6 fan fiction, embarrassing Hiro.