# The Thundermans: Undercover

The Thundermans: Undercover is an American comedy television series developed by Jed Spingarn, Sean W. Cunningham, and Marc Dworkin, serving as a spinoff and sequel to The Thundermans (2013–2018) and The Thundermans Return (2024). It premiered on Nickelodeon on January 11, 2025, with a sneak peek after the network's alternate broadcast of the NFL Wild Card game. It later premiered officially on January 22, 2025.

## Premise

Following the events of The Thundermans Return, The Thundermans: Undercover follows Phoebe and Max, who are sent undercover to handle a new threat in the seaside town of Secret Shores and bring Chloe along with them to develop her superhero talent. This new threat soon involves the mysterious villain Mastermind who is plotting to create a new incarnation of the Villain League by calling all villains to come to Secret Shores.

## Cast
### Main

* Kira Kosarin as Phoebe Thunderman, one half of the Thunder Twins. When undercover in Secret Shores, Phoebe works as the art teacher at Secret Shores School despite being bad at art as seen in the original series. She possesses heat and freeze breath, telekinesis, and 'thunder sense'.
* Jack Griffo as Max Thunderman, one half of the Thunder Twins. When undercover in Secret Shores, Max works as the vice principal at Secret Shores School. Since he is Phoebe's twin, he has the exact same powers she has.
* Maya Le Clark as Chloe Thunderman, the youngest sister of Phoebe and Max who can teleport
* Nathan Broxton as Jinx, one of Chloe's friends in Secret Shores who is accident-prone and an quick-learner of different technologies
* Kinley Cunningham as Kombucha, one of Chloe's friends in Secret Shores who is a spiritualistic hippie that lives in a beach yurt with her family

### Recurring

* Daran Norris as Thunderford, Max, Phoebe, and Chloe's virtual assistant at their condo
* Dana Snyder as the voice of Dr. Colosso, a supervillain who is trapped in the form of a rabbit that is owned by the Thundermans
** Joe Echallier, Agnieszka Echallier, and Glenn Williams serve as the puppeteers of Dr. Colosso's rabbit form

### Guest

* Chris Tallman as Hank Thunderman, the father of Phoebe, Max, and Chloe with flight and super-strength
* Rosa Blasi as Barb Thunderman, the electrokinetic mother of Phoebe, Max, and Chloe
* Diego Velazquez as Billy Thunderman, the brother of Phoebe, Max, and Chloe who possesses super-speed
* Ryan Ochoa as Malware, a supervillain with a sentient Giga Gauntlet who is wanting to join Mastermind's incarnation of the Villain League
* Nikolai Witschl and Darin De Paul as Mastermind, a mysterious supervillain who is planning to start a new incarnation of the Villain League in Secret Shores. Witschl performs Mastermind while De Paul voices him.
* Daniele Gaither as Super President Kickbutt, the leader of the Hero League that the Thundermans answer to
* Helen Hong as Mrs. Wong, the proprietor of Splatburger who also owns Splat By-The-Sea
* Jennifer Spence as Principal Taylor, the principal of Secret Shores School
* Katrina Reynolds as Adele, Jinx's mother
* Toby Berner as Randy, Kombucha's father
* Tony Alcantar as Brain Freeze, an ice cream vendor-themed villain auditioning to be part of Mastermind's Villain League whose gun induces Brain Freeze on anyone
* Audrey Whitby as Cherry Seinfield, Phoebe's best friend who still has her spark-based abilities from the reunion movie
* Lilimar Hernandez as Kitty Klaw, a cat-themed supervillain and master thief with lightning-fast cheetah powers who is auditioning to join Mastermind's incarnation of the Villain League.
* Kenny Ridwan as Gideon
* Jeff Meacham as Principal Bradford
Jessica Marie Garcia and Anna McNulty will also appear as guests in currently unknown roles.

## Episodes

| No. | Title | Directed by | Written by | Original release date | Prod. code |
| 1 | "Thundercover" | Trevor Kirschner | Jed Spingarn & Sean W. Cunningham & Marc Dworkin | January 11, 2025 (2025-1-11) (sneak peek) January 22, 2025 (2025-1-22) (official) | 101 |
| Max and Phoebe worry that Chloe's friends Blair and Tiff are taking advantage of her, so they go undercover in Secret Shores on a mission from Super President Kickbutt. They bring Chloe along to help her make real friends and live a normal life. Dr. Colosso joins them, as a mysterious figure promises to restore his human form in exchange for a specific item. Upon arrival, Phoebe and Max begin their mission, while Chloe starts at Secret Shores School, where she befriends Booch and Jinx. Meanwhile, Dr. Colosso is tricked into obtaining a key card to a weapons vault, allowing the villain Malware to recover his sentient Giga Gauntlet. Chloe learns why she was brought to Secret Shores and teleports back to Hiddenville, just as Super President Kickbutt informs Max and Phoebe that Malware has escaped prison. Max and Phoebe track him down and fight Malware, but he captures them and traps them in a "firewall." Chloe, realizing that Blair and Tiff are taking advantage of her, returns to rescue Max and Phoebe. Together, they defeat Malware and confiscate his Giga Gauntlet. After Malware's arrest and Dr. Colosso's house arrest, Super President Kickbutt reveals an encrypted transmission from the villain Mastermind, inviting others to join a new Villain League in Secret Shores. Max, Phoebe, and Chloe decide to stay in Secret Shores to stop any new threats. Special guest stars: Chris Tallman as Hank, Rosa Blasi as Barb, Diego Velazquez as Billy Guest stars: Ryan Ochoa as Malware, Nikolai Witschl as Mastermind, Mela Piertropalo as Blair, Ivory Baker as Tiff, Daniele Gaither as President Kickbutt ||||||
| 2 | "Faulty Powers" | Trevor Kirschner | Sean W. Cunningham & Marc Dworkin | January 22, 2025 (2025-1-22) | 104 |
| During superhero training to prepare for confronting Mastermind, Chloe is accidentally hit by a gamma energy ball, which mixes with Phoebe's sunscreen and causes her to turn invisible. Thunderford scans Chloe and finds that the combination has disrupted her powers, and he works on a cure. However, Dr. Colosso can't help because he's three credits short of completing his evil medical degree. As Phoebe and Max try to control Chloe, she develops random superpowers, tapping into abilities from the entire Thunderman family. Although Max manages to fix Chloe's powers using a gamma energy ball with a reversed electromagnetic field, Thunderford warns them that Chloe will experience a new power that will affect her appearance during a party at Splat By-The-Sea. Chloe shapeshifts into a cupcake. Phoebe and Max use a clever tactic to find the cupcake, realizing it's actually Chloe. Thunderford eventually finds a cure for Chloe's condition and sends the prescription to a local super doctor. Meanwhile, Dr. Colosso gives an online speech about his graduation from Evil University Online, only to realize he was on mute the entire time. Guest star: Michael Delleva as Wayland ||||||
| 3 | "Bummer School" | Trevor Kirschner | Sean W. Cunningham & Marc Dworkin | January 29, 2025 (2025-1-29) | 103 |
| To fit in at Secret Shores, Max and Phoebe take jobs at Secret Shores School—Max becomes the vice-principal, and Phoebe becomes the art teacher, much to Chloe's surprise since Phoebe admits she's terrible at art. At the school, Max and Phoebe argue, and Principal Taylor tells Chloe about the Mascot Masc-Off, where students design a new school mascot. The old otter mascot was retired after a supposed attack by a family of otters, for which Phoebe and Max are blamed. Chloe gets Kombucha and Jinx to join the competition. When Principal Taylor shows Phoebe a resume that includes a fake claim made by Max that Phoebe spent four months in prison for sampling grapes at a supermarket, Phoebe and Max get into a fight. In the chaos, they accidentally break the narwhal mascot's head. Chloe snaps at them for their irresponsibility. After making up, Phoebe and Max enlist Dr. Colosso, who's surprisingly good at art, to fix the mascot. In the Mascot Masc-Off, the first entry is a sunscreen mascot, but Phoebe and Max manage to finish the narwhal mascot. Principal Taylor is impressed and declares it the winning design. Guest stars: Jennifer Spence as Principal Taylor, Berkley Holtrop as Sunscreen Kid ||||||
| 4 | "The Parent Zap" | Trevor Kirschner | Jed Spingarn | February 5, 2025 (2025-2-5) | 102 |
| Thunderford gives Phoebe, Max, and Chloe gadgets for their mission. Meanwhile, Phoebe and Max let Chloe, Kombucha, and Jinx watch a horror movie and eat candy, which results in Kombucha becoming hyper and Jinx getting scared. This prompts Randy and Adele, Kombucha and Jinx's parents, to want to meet Chloe. With Hank and Barb away on a mission, Max and Phoebe use the Disguise-alizer to impersonate them to keep things smooth. However, when the real Hank and Barb return, they figure out what's going on and transform into Max and Phoebe, causing chaos. Chloe, Max, and Phoebe scramble to fix the situation before their cover is blown and Chloe loses her friends. After a botched attempt, Chloe convinces Principal Taylor to speak positively about the Thundermans, allowing Kombucha and Jinx to stay friends with her. The twist: Principal Taylor was actually Dr. Colosso in disguise. Hank and Barb take the Disguise-alizer and head off to bring Billy and Nora back from the Moon, with Hank making his usual dramatic exit through the roof. Special guest stars: Chris Tallman as Hank, Rosa Blasi as Barb Guest stars: Katrina Reynolds as Adele, Toby Berner as Randy, Jennifer Spence as Principal Taylor ||||||
| 5 | "Save the Date" | Jon Rosenbaum | Hannah Suria | February 12, 2025 (2025-2-12) | TBA |
| Max avoids dish duty while dining with Phoebe and Chloe at Splat By-The-Sea. After a run-in with his surfboards, Phoebe meets Trey, a surf shop employee. She shows Max and Chloe footage of a suspicious ice cream truck in Secret Shores, and Chloe plans to help Phoebe ask Trey out. Max bets Phoebe that if she can turn off Thundergirl for a day, he'll do the dishes. Phoebe impresses Trey, while Max struggles with crime detection. After Phoebe secures a date with Trey, Max and Dr. Colosso create a fake emergency to sabotage Chloe's bet. Meanwhile, Phoebe picks out a date outfit with Thunderford's help. Max tries to trick Phoebe into becoming Thundergirl, but she stays focused on her date. At Splat By-The-Sea, Booch and Jinx search for a lost earbud. Max calls Phoebe about the ice cream truck, and Chloe leaves to check on him, assuming he's lying. They are ambushed by Brain Freeze, an ice cream villain who uses a brain-freezing gun to incapacitate them. Brain Freeze plans to brainwash Secret Shores, but Phoebe arrives just in time to destroy his hypno-sonic speakers and save the day. She heads back to her date with Trey, and Max admits he'll do the dishes after losing the bet. Guest stars: Nikolai Witschl as Mastermind, Michael Delleva as Wayland, Wei Chung as Trey, Tony Alcantar as Brain Freeze ||||||
| 6 | "Cherry Bad Things" | Jon Rosenbaum | Nora Sullivan | February 26, 2025 (2025-2-26) | 106 |
| While Chloe, Kombucha, and Jinx make plans, Phoebe cleans the house in preparation for her best friend Cherry's visit to Secret Shores. Kombucha mentions she has to jellyfish-proof her yurt with peanut butter, and Phoebe invites her to join her and Cherry at a high-tech spa. Kombucha hesitates but agrees after Chloe mentions the spa has massage chairs. After Kombucha and Jinx leave to visit Nana Jinx, Cherry arrives, and Max is surprised to see she still has her sparkle powers. Cherry claims she got lost and ended up at the League of Heroes sandwich shop instead of HQ. Thunderford tells Phoebe they can remove Cherry's sparkle powers with the Super Undooper Power Remover Wand, which he orders using Phoebe's credit card. When the wand arrives, Phoebe learns she missed her Hero League appointment on purpose. She and Cherry agree to use the wand before Cherry heads back to Hiddenville. Later, Phoebe and Cherry meet up with Chloe and Kombucha at the spa, while Max is visited by Jinx, who wants to join his guys' night and wins him over with two VR headsets. At the spa, Phoebe and Chloe try to keep Kombucha from noticing Cherry using her powers. Meanwhile, Dr. Colosso, jealous of Max spending time with Jinx, tries to sabotage their VR game with darts, but keeps missing. At the spa, the nail polish machine startles Cherry, causing her to accidentally destroy the spa's control panel, triggering its privacy mode. Phoebe freezes Kombucha and comes up with a plan, while Dr. Colosso continues missing his dart shots at Max and Jinx. Phoebe has Cherry use her sparkle powers to cut through a door and free them just as Kombucha thaws out. Phoebe and Cherry return to the condo, covering up their night, and Phoebe finally persuades Cherry to give up her sparkle powers. Once that is done, Phoebe and Cherry do a "best friends, no powers, never going to a spa again" selfie. Guest star: Audrey Whitby as Cherry ||||||
| 7 | "Not So Fast and Furious" | Wendy Faraone | Scott Taylor & Wesley Jermaine Johnson | March 5, 2025 (2025-3-5) | 107 |
| Max sends Chloe on a mission to run international errands while Phoebe learns that Kitty Klaw, a lightning-fast supervillain with cheetah powers, is causing havoc in Secret Shores. Chloe leaves to bring Billy to help fight Kitty Klaw. Billy agrees to assist, but Max sends him on errands instead. Meanwhile, Chloe, Kombucha, and Jinx sneak into Secret Shores School for a ghost hunt so Jinx can join the Paranormal Club. Billy causes an avalanche in Chile and regrets it, deciding to retire from being a hero. Max tries to convince him otherwise, but Billy remains firm. Phoebe tracks Kitty Klaw to an abandoned zoo, where she's captured and tied up by Kitty Klaw. Max, unable to convince Billy to help, runs to save Phoebe himself. Chloe pretends to be the ghost to scare off the Paranormal Club members, while Billy arrives just in time to save Max and Phoebe. Billy defeats Kitty Klaw, trapping her in her own device. Back at the condo, Billy is thanked for his help. Chloe heads to Switzerland for hot cocoa, leaving Max behind, while Phoebe and Max toast to Billy's victory over Kitty Klaw. Special guest star: Diego Velazquez as Billy Guest stars: Lilimar Hernandez as Kitty Klaw, Ellexis Wejr as Morgana, Billy Christos Jr. as Horatio, Casey Trotter as Bob ||||||
| 8 | "For Your Spies Only" | Wendy Faraone | Angela Yarbrough | March 12, 2025 (2025-3-12) | 108 |
| 9 | "No Friend in Sight" | Trevor Kirschner | Samantha Martin | March 19, 2025 (2025-3-19) | 111 |
| 10 | "All About Steve" | TBA | Dan Serafin | March 26, 2025 (2025-3-26) | 109 |
| 11 | "Tide and Prejudice" | TBA | TBA | April 2, 2025 (2025-4-2) | TBA |
| TBA | "Prank You, Next" | Kira Kosarin | Chris Tallman | TBA | TBA |

## Production

Following the success of The Thundermans Return, a spinoff series was announced on May 16, 2024. Production began in August 2024 in Vancouver, British Columbia. The first season was ordered for 26 episodes, according to the Writers Guild of America directory listing, and the final episode of the season received its credits on January 10, 2025. It premiered on January 11, 2025, as a sneak peek promotion but officially began airing on January 22, 2025.

## Reception

Fernanda Camargo of Common Sense Media gave the series a 2 out of 5 stars, stating that "watching The Thundermans: Undercover sometimes feels like seeing a show that tries to address previous criticisms, but ends up falling into the same traps."