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.

Max seeks help dealing with a mystery prankster at school from his old principal, who was always the target of his pranks.

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.

Billy brings a new sidekick, Steve, to town and wants him to join the T-Force; Phoebe and Max agree to consider him, but when they eventually reject Steve for having a very lame power, he turns evil.

Chloe feels smothered and thinks it's because Phoebe and Max need friends. In trying to make friends, Phoebe and Max accidentally make the same friend named Brenda and fight over her.

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.

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.

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.

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.

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.

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

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.

Phoebe and Max are assigned a new mission in their hi-tech beach home base, where their superhero identities remain a secret. They bring Chloe along to help her have a normal life, but the trio must stop the threats of Secret Shores and the true supervillain known as the Mastermind.