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"Aunt Cass Goes Out" is the eighth episode of Big Hero 6: The Series. It premiered on June 30, 2018.


Representing the Frederickson family in his father's place, Fred invites Hiro, Baymax, and Go Go to the unavailing of a new product at Krei Tech Industries called "Buddy-Guard": A small military grade drone designed to be a personal bodyguard. It is capable of countering any attack, armed with lasers, bolas launchers, and flexible display technology that can turn it invisible. The flexible display technology was designed by Doctor Mel Myers, who is not pleased with what Krei has done with his invention. He originally wanted it to be used for fun things at surprise parties. When Krei refuses to give back Mel's plans, he vows to get back at him. Meanwhile, Hiro struggles with keeping his Big Hero 6 identity a secret from his Aunt Cass, who almost busts him from time to time. He cannot just tell her he is a superhero because she would go berserk. So, he decides to find her a date to distract her. Later at San Fransokyo Tech, Hiro and his friends are visited by Krei, who wants them to inspect the Buddy-Guard. Taking up what Hiro and Go Go said earlier about safe guards, it turns out the drone has some glitches that his employees could not decipher. He personally wants Hiro and his friends to make sure the drone is safe in exchange of keeping their Big Hero 6 identities a secret, much to their shock. As Krei leaves, he bumps into Cass who catches him as he's about to fall. Hiro asks her why she'd come and, after bringing her attention back to Hiro from Krei, tells him he forgot his chemistry homework. Krei tells her, "I think I'm feeling a little chemistry right now." Much to Hiro's displeasure, Krei and Cass instantly develop a mutual attraction for one another. He tries to get his aunt away from Krei, but it is no use. Krei asks her out for dinner and she accepts.

By evening, Hiro is still unhappy with his aunt dating Krei. While it was his idea to get Cass to date, he did not want it to be with Krei. Krei then shows up at the Lucky Cat Café with a bouquet of flowers. He converses with Hiro a while with the somewhat strange idea that it's the third time he's seen Hiro that day and then asks, "Is your aunt ready?" To which Cass answers herself, "She is." and comes in ready to go. Krei pauses for a moment in awe of her. Baymax walks over to Krei stating, "Mr. Krei, your heart rate is elevated. Are you feeling well?" To which Krei responds that he feels, "Better than well!" and presents the flowers to her, and she gives them to a sulking Hiro before leaving. After dumping the flowers in the toilet, Hiro worries about what might happen if Cass and Krei's date goes well and asks Baymax, "They couldn't get married, could they?" Baymax tells him that they could since they're legally allowed to, "Mr. Krei would then be your uncle." Horrified by the idea, "Uncle Krei?! Not happening!" Hiro decides to follow them and make sure their date does not go well. Meanwhile, Honey, Go Go, and Wasabi are still at work on the drone. Wasabi points out that GoGo and Hiro were right, "It wouldn't take much of a glitch to scramble this thing's programming." Fred later shows up with some dinner for everyone: Noodle burgers and coke, "Who needs a Noodle Burger break?" Honey Lemon and GoGo answer in the affirmative showing they were pretty hungry. Fred accidentally spills coke on the drone, which causes it to power up and attack them. It goes invisible making it difficult to stop it. So, Fred uses ketchup packets to find it by throwing ketchup until it gets on to the drone and they can disable it. They eventually disable it and realize that its threat assessment program was shorted out when it got soaked, making it think they were all enemies.

Hiro and Baymax follow Krei and Cass to a fancy restaurant, and Hiro sneaks in through the backdoor. He finds Cass and Krei sitting at a table, getting more and more acquainted with one another. They both realize that they love origami. Hiding under a serving trolley, Hiro causes a waiter to trip and spill Krei's food on his shirt. He gets ticked off, but then tries to be calm and forgivable in front of Cass. Then he goes to the washroom to get cleaned up, where he is ambushed by Doctor Mel. He has him tied up, and then walks out of the washroom looking like Krei, wearing his flexible display invention around his face. He prepares to go back to Krei Tech to steal back his plans, but is forced to take Cass along when she thinks he is the real Krei. Both Hiro and Baymax notice something is off, which is confirmed when Hiro finds Krei tied up in the washroom.

Upon arriving at Krei Tech, Mel breaks into Krei's office, but Krei and Big Hero 6 are already there waiting for him. After taking back the the flexible display plans from Mel, Big Hero 6 tell Krei that he cannot sell those drones because of what happens when they get wet. Krei agrees to delay shippings until they are perfected. He then tries to get the drones to apprehend Myers, who gets behind Fred. He ends up tickling him, causing him to ignite his flamethrower, setting off the sprinklers. The drones get wet, and they go haywire like before. They easily beat Big Hero 6, and then chase after Mel. Cass is still in the limousine showing pictures of Mochi to the chauffeur. Mel shows up and gets in the back, while Cass takes the wheel when the (totally not interested) chauffeur runs off. Racing through the streets, the drones chase after Cass and Mel. Hiro and Baymax eventually catch up with them after breaking free of their restrains. Baymax destroys two of the drones, and Hiro hitches a ride on one until it crashes. Cass and Mel escape to the woods, but one remaining drone catches up with them. Cass and Mel try to escape on foot but become cornered until Baymax's rocket fist takes out the last drone. Afterwards, Mel is arrested, Cass dumps Krei after seeing his true colors. The next day, Baymax asks Hiro if he's going to try to find Cass another boyfriend. Hiro says he won't and has decided to never again meddle in his aunt's personal life.



The Disney Wiki has a collection of images and media related to Aunt Cass Goes Out.


  • It is revealed in this episode that Krei knows the identities of Big Hero 6.
  • Felony Carl's age is revealed to be forty-two.
  • This is the first time someone who isn't Krei (Judy) ruffles Hiro's hair.

International Premieres

v - e - d
Big Hero 6 logo
Films and Television: Big Hero 6 (video/soundtrack) • Big Hero 6: The SeriesBig Chibi 6: The ShortsBaymax!

Books: MangaThe Art of Big Hero 6Comic Books
Video Games: Big Hero 6: Battle in the BayBig Hero 6: Bot FightDisney Infinity seriesBig Hero 6: Baymax BlastKingdom Hearts IIIDisney Crossy RoadDisney Emoji BlitzDisney Magic KingdomsDisney Heroes: Battle ModeDisney Sorcerer's Arena

Disney Parks
San Fransokyo SquareThe Happy Ride with BaymaxThe AnnexThe Magic of Disney AnimationPLAY!

Entertainment: Baymax Super Exercise Expo
Fireworks: Happily Ever AfterDisney EnchantmentIlluminate! A Nighttime CelebrationMomentousWonderful World of AnimationDisney in the StarsWondrous Journeys
Parades: Dreaming Up!Disney Harmony in Color! Parade

Original: Hiro HamadaBaymaxTadashi HamadaGo Go TomagoHoney LemonWasabiFredAunt CassRobert Callaghan/YokaiAbigail CallaghanAlistair KreiSergeant GersonMochiYamaMr. FredericksonMrs. FredericksonHeathcliffJudyThe Ringleader

The Series: Professor GranvilleObakeBaron Von SteamerKarmiHigh VoltageRichardson MoleGlobbyFelony CarlMomakaseMad JacksMini-MaxMr. SparklesWendy WowerTrevor TrengroveNoodle Burger BoyLenore ShimamotoTrinaLiv AmaraDi AmaraOrso KnoxMegan CruzChief CruzChrisAC and DCNega-GlobbyMayoiSupersonic SueHardlightRoddy Blair
Baymax!: Kiko TanakaSofiaAliMbitaYukioYachi
Deleted: The Fujitas

Big Hero 6: The Series

Shorts: "Baymax and Fred" • "Baymax and Go Go" • "Baymax and Wasabi" • "Baymax and Hiro" • "Baymax and Mochi" • "Baymax and Honey Lemon" • "Baymax Dreams of Too Many Baymaxes" • "Baymax Dreams of Evil Sheep" • "Baymax Dreams of Bed Bugs" • "Baymax Dreams of Mochizilla" • "Baymax Dreams of Too Many Freds"
Season One: "Baymax Returns" • "Issue 188" • "Big Roommates 2" • "Fred's Bro-Tillion" • "Food Fight" • "Muirahara Woods" • "Failure Mode" • "Aunt Cass Goes Out" • "The Impatient Patient" • "Mr. Sparkles Loses His Sparkle" • "Killer App" • "Small Hiro One" • "Kentucky Kaiju" • "Rivalry Weak" • "Fan Friction" • "Mini-Max" • "Big Hero 7" • "Big Problem" • "Steamer's Revenge" • "The Bot Fighter" • "Obake Yashiki" • "Countdown to Catastrophe"
Season Two: "Internabout" • "Seventh Wheel" • "Prey Date" • "Something's Fishy" • "Nega-Globby" • "The Fate of the Roommates" • "Muira-Horror!" • "Something Fluffy" • "Supersonic Sue" • "Lie Detector" • "Write Turn Here" • "City of Monsters" • "Mini-Maximum Trouble" • "El Fuego" • "The Globby Within" • "Hardlight" • "The Present" • "Hiro the Villain" • "Portal Enemy" • "Fred the Fugitive" • "Major Blast" • "Fear Not" • "Legacies"
Season Three: "The Hyper-Potamus Pizza-Party-Torium" • "Mayor for a Day/The Dog Craze of Summer" • "Trading Chips/Mini Noodle Burger Max" • "A Friendly Face/Big Chibi 6" • "Cobra and Mongoose/Better Off Fred" • "Big Hero Battle/Go Go the Woweroo" • "The New Nega-Globby/De-Based" • "The MiSFIT/Return To Sycorax" • "A Fresh Sparkles/Noodle Burger Ploy" • "Krei-oke Night/The Mascot Upshot"

Baymax!: "Cass" • "Kiko" • "Sofia" • "Mbita" • "Yachi" • "Baymax"

Big Hero 6
San FransokyoLucky Cat CaféSan Fransokyo Institute of TechnologyAkuma IslandFrederickson ManorKrei Tech IndustriesNoodle BurgerObake's LairSycoraxFrederickson Candy Co.
MicrobotsMegabotBaymax's ChipHoney Lemon's Chem-PurseYokai's MaskLittle YamaSilent SparrowSkymaxesLenore Shimamoto's JournalKentucky KaijuEnergy AmplifierGo Go's Cycle
StoryImmortalsWe've Got Dance PowerNoodle SongWe're Gonna Be GoodWe Are 4 2 SingDark MatterWoweroo RapB-A-Y-M-A-XA New AngleHappy SongBa La La La La La La La LaKoo Loo LeeOne Sweet Ride