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

Momakase blackmails Hiro into helping her steal her family's knives from Yama's safe.

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.

Megan confronts Hiro about being a vigilante and threatens to tell Chief Cruz the truth.

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

Big Hero 6 must stop a secret underground racing league.

Big Hero 6 attempts to thwart a bank robbery and encounter Supersonic Sue, an old school roller skating villain.

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

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

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

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

After the gang goes to a spooky haunted house, Hiro keeps seeing Tadashi around the city and ultimately finds himself face to face with his brother.

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

Honey Lemon sets out to make Globby human again.

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

Honey Lemon takes art classes at a rival school.

Karmi posts Big Hero 6 fan fiction, embarrassing Hiro.

Hiro’s jealousy of Karmi’s internship at Sycorax leads him to intern at Krei Tech.

When Aunt Cass sets Hiro up on a date, he begins to wonder if he’s missing out on being a regular kid.

Big Hero 6 must continue to fight off a city overrun with monsters.

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

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.

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.

When a monster wreaks havoc in San Fransokyo, Big Hero 6 must go on a real-life monster hunt.

Mayoi, mysterious yet adorable creatures, begin to appear in San Fransokyo.