The Thundermans: Undercover

8.1
2025

Production

Logo for Nickelodeon Productions

Twins Phoebe and Max Thunderman embark on a mission to alleviate the threat in the seaside town of Secret Shores, as well as helping Chloe develop her superhero abilities by bringing her along on their undercover mission. Chloe forms a bond with two classmates while they investigate suspicious activity coming from the local school, who don’t realize their new friend has secret powers. As the danger increases, the Thunderman trio must stay in town indefinitely, leaving the squabbling twins in charge of raising their younger sister.

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Trailers & Videos

Thumbnail for video: Official Trailer

Official Trailer

Thumbnail for video: Kira Kosarin & Jack Griffo return as Phoebe and Max in The Thundermans: Undercover | BAFTA

Kira Kosarin & Jack Griffo return as Phoebe and Max in The Thundermans: Undercover | BAFTA

Seasons

26 Episodes • Premiered 2025

Still image for The Thundermans: Undercover season 1 episode 1: Thundercover

1. Thundercover

9.7

Max and Phoebe bring Chloe on an undercover mission in a new town, so she can experience life as a normal kid.

Still image for The Thundermans: Undercover season 1 episode 2: Faulty Powers

2. Faulty Powers

7.1

A training accident makes Chloe's powers faulty. Max tries to cure her and gets a misleading positive result, so she goes to a party. But his treatment actually creates brand new powers Chloe can't control, so the twins have to get her out!

Still image for The Thundermans: Undercover season 1 episode 3: Bummer School

3. Bummer School

10.0

Chloe, Jinx, and Booch are designing a school mascot, but Max and Phoebe's feud over their jobs ruins the project. Chloe reads them the riot act, and the twins realize their twin-fighting affects Chloe now that they're guardians.

Still image for The Thundermans: Undercover season 1 episode 4: The Parent Zap

4. The Parent Zap

10.0

After Phoebe and Max let Chloe's friends watch a horror movie and eat candy, Jinx and Booch's parents want to meet Chloe's. With Hank and Barb away, Max and Phoebe transform into them to help Chloe. It goes well until the real Hank and Barb show up.

Still image for The Thundermans: Undercover season 1 episode 5: Save the Date

5. Save the Date

10.0

Max bets Phoebe she can't turn off being a superhero and go on a normal date. Chloe helps Phoebe do well on the date, but Max tries to sabotage by crying wolf. Suddenly, a real supervillain emerges and puts Max and Chloe in serious danger.

Still image for The Thundermans: Undercover season 1 episode 6: Cherry Bad Things

6. Cherry Bad Things

10.0

Cherry visits and Max discovers Phoebe never took her sparkle power away. Phoebe promises to do so and has a girls' night with Cherry while Max hosts Jinx. Colosso gets jealous, and Cherry's powers malfunction, nearly blowing Phoebe's cover.

Still image for The Thundermans: Undercover season 1 episode 7: Not So Fast and Furious

7. Not So Fast and Furious

10.0

A new super-fast villain is wreaking havoc in Secret Shores, and Billy is the only hope at tracking her down. After Billy's speed accidentally triggers an avalanche, however, he decides to hang up his cape and retire from being a superhero.

Still image for The Thundermans: Undercover season 1 episode 8: For Your Spies Only

8. For Your Spies Only

10.0

Max and Phoebe attend Parent-Teacher Night, leaving Chloe to have friends over without adult supervision. Jinx finds the Air Lair and believes spies are targeting the school, and his meddling puts Max and Phoebe's school jobs at risk.

Still image for The Thundermans: Undercover season 1 episode 9: No Friend in Sight

9. No Friend in Sight

10.0

Chloe feels smothered by Max and Phoebe, and encourages them to make new friends. However, the twins unwittingly make the same friend, and begin a battle for the ages over her. Chloe's new alone time is interrupted by living room-crashing pelican.

Still image for The Thundermans: Undercover season 1 episode 10: All About Steve

10. All About Steve

10.0

Billy arrives, hopeful that his new sidekick Steve can join the T-Force. Phoebe and Max consider it, but soon discover that his superpower is making marshmallows. After they reject Steve's bid to join the team, he turns evil and vows revenge.

Still image for The Thundermans: Undercover season 1 episode 11: Tide and Prejudice

11. Tide and Prejudice

10.0

The former protector of Secret Shores arrives at the Thundermans' beach house and reclaims it as his home. Phoebe, Max, and Chloe try to reason with him, but when a protest at the school goes wrong, the former hero proves more harmful than helpful.

Still image for The Thundermans: Undercover season 1 episode 12: Prank You, Next

12. Prank You, Next

10.0

After Max is targeted by a mystery prankster at school, he seeks help from Principal Bradford. But Max fails to stop the pranks and quits the mission in embarrassment, prompting Chloe to confess that she was the prankster all along.

Still image for The Thundermans: Undercover season 1 episode 13: From Dust Till Dawn

13. From Dust Till Dawn

10.0

Chloe doesn't want to learn leadership skills. But when a villain attacks her field trip trying to steal a space geode, Max and Phoebe have to put Chloe in charge while they try to take down the villain and defuse his dangerous astronomical weapon.

Still image for The Thundermans: Undercover season 1 episode 14: Summer of Secrets

14. Summer of Secrets

10.0

Chloe has been missing school by going on missions with her siblings. She now has to go to summer school to catch up on everything she has missed. Max, acting as the substitute for summer school, has a new student who agrees to tutor her.

Still image for The Thundermans: Undercover season 1 episode 15: I Know What You Did This Summer

15. I Know What You Did This Summer

10.0

B.C. invites Chloe to a launch party, and at the same time Jinx and Booch invite Chloe to protest outside the party. Not wanting to hurt anyone's feelings Chloe tries to do both. Phoebe is keeping her working with Captain Perfect a secret from Max.

Still image for The Thundermans: Undercover season 1 episode 16: The Summer I Turned Giddy

16. The Summer I Turned Giddy

10.0

Upset that Phoebe secretly partnered with Captain Perfect, Max decides to have a new superhero partner, his best friend Gideon. But things go wrong when Max tries to make Gideon a better superhero.

Still image for The Thundermans: Undercover season 1 episode 17: A Midsummer Knight's Scheme

17. A Midsummer Knight's Scheme

10.0

Captain Perfect's younger sister, Penny, is headed down the path of becoming a supervillain. Eager to impress Captain Perfect, Max takes it upon himself to guide her toward a better path.

Still image for The Thundermans: Undercover season 1 episode 18: Cruel Summer

18. Cruel Summer

10.0

Max flees from Phoebe and Captain Perfect to prove his innocence when he is wrongly accused of committing a crime.

Still image for The Thundermans: Undercover season 1 episode 19: Endless Summer

19. Endless Summer

10.0

Max pretends to turn evil to infiltrate Mastermind's henchmen and steal the Chip-Chucker, a device that previously turned him evil.

Still image for The Thundermans: Undercover season 1 episode 20: The Max of Life

20. The Max of Life

Max misses being famous and having fans, so he decides to break Booch's sandwich-stacking record to be famous again. Chloe rallies behind Bootch so that she can take back her record.

Still image for The Thundermans: Undercover season 1 episode 21: Love Is in the Lair

21. Love Is in the Lair

Mrs. Wong visits Secret Shores, and threatens to reveal the Thundermans' superhero identities to the town. But Max and Phoebe's plan to have Dr. Colosso keep her quiet backfires in ways they could not have imagined.

Still image for The Thundermans: Undercover season 1 episode 22: She's All Splat

22. She's All Splat

With Cherry working at Splat by Sea, Max gets her into a fake dating scheme to obtain discounts at the restaurant; Chloe faces a tough choice.

Still image for The Thundermans: Undercover season 1 episode 23: Party All the Crime

23. Party All the Crime

Chloe's birthday party is cancelled and Max and Phoebe compete to throw her a new one; Max's time-stopping birthday gift falls into the wrong hands.

Still image for The Thundermans: Undercover season 1 episode 24: The Mastermind Unmasked: Part 1

24. The Mastermind Unmasked: Part 1

Max and Phoebe discover that Lazlo Chance may be the evil Mastermind and enlist Chloe to help, but Chloe is torn between her head and her heart.

Still image for The Thundermans: Undercover season 1 episode 25: The Mastermind Unmasked: Part 2

25. The Mastermind Unmasked: Part 2

When The Mastermind forces Chloe to steal a magical amulet that grants him superhero powers, the Thundermans unite to stop his plan. Chloe must reveal her identity to save her friends.

Still image for The Thundermans: Undercover season 1 episode 26: The Most Thunderful Time of the Year

26. The Most Thunderful Time of the Year

Phoebe and Max tell holiday stories to compete in the Thundermans Story Slam, but it's Chloe's story that makes them understand the meaning of the holiday.

Cast

Photo of Kira Kosarin

Kira Kosarin

Phoebe Thunderman

Photo of Jack Griffo

Jack Griffo

Max Thunderman

Photo of Maya Le Clark

Maya Le Clark

Chloe Thunderman

Photo of Daran Norris

Daran Norris

Thunderford

Photo of Dana Snyder

Dana Snyder

Dr. Colosso

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