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.
Episode 1
Max and Phoebe bring Chloe on an undercover mission in a new town, so she can experience life as a normal kid.
Episode 2
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.
Episode 3
Chloe's mascot project fails due to Max and Phoebe's feud; twins learn how fighting affects Chloe.
Episode 4
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.
Episode 5
Max bets Phoebe she can't turn off being a superhero and go on a normal date.
Episode 6
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; Cherry's powers malfunction, nearly blowing Phoebe's cover.
Episode 7
A new super-fast villain is wreaking havoc in Secret Shores; after Billy's speed accidentally triggers an avalanche, he decides to hang up his cape and retire.
Episode 8
Max and Phoebe attend a 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.
Episode 9
Chloe feels smothered and thinks it's because Phobe and Max need friends; Phoebe and Max accidentally make the same friend named Brenda and fight over her.
Episode 10
Billy brings a new sidekick, to join the T-Force; but when they reject him, he turns evil.
Episode 11
The former protector of Secret Shores arrives at the Thundermans' beach house.
Episode 12
Max seeks help dealing with a mystery prankster at school from his old principal, who was always the target of his pranks.
Episode 13
Chloe struggles with her leadership skills; when a villain attacks her school field trip, Max and Phoebe have to put Chloe in charge while they try to take down the villain and defuse his dangerous astronomical weapon.
Episode 14
Chloe must attend summer school, and Max is assigned to be her teacher. While they will be busy all summer, Phoebe goes solo with a new superhero named Captain Perfect.
Episode 15
B.C. invites Chloe to a launch party at Splat By The Sea, at the same time Jinx and Booch invite Chloe to protest outside the party. Phoebe is keeping her work with Captain Perfect.
Episode 16
Upset that Phoebe has a new partner, Max decides to partner with his friend Gideon. But things backfire when Max tries to turn Gideon into a supersized superhero.
Episode 17
Max agrees to mentor Captain Perfect's younger sister, who is headed down the path of becoming a supervillain. She tries to become one of Mastermind's henchmen.
Episode 18
Max and Phoebe are working well as a team, until he is accused of committing crimes and Phoebe must apprehend him.
Episode 19
Max pretends to turn evil to infiltrate Mastermind's henchmen and steal the Chip-Chucker, a device that previously turned him evil.
Episode 20
No overview available.
Episode 21
No overview available.
Episode 22
No overview available.
Episode 23
No overview available.
Episode 24
No overview available.
Episode 25
No overview available.
Episode 26
No overview available.
