Congratulations Max and Phoebe Thunderman. You are both finalists for a slot on the Legendary Z-Force... as a team! Good luck.
The Z-Force is an elite team of superheroes on The Thundermans. It was run by the Hero League, now by The Thunder Twins, and comprises of the best superheroes in the league. These superheroes are called when other superheroes require help. The chances of joining the Z-Force are very low and getting into it is a big honor.
In Thundermans: Banished!, there is a new slot opening in the Z-Force for the first time in 9 years. The Z-Force sent out invitations to some of the best superheroes for a chance to fill the slot. Phoebe Thunderman is chosen as one of the finalists for defeating one of the most powerful villains, Dark Mayhem in Thundermans: Secret Revealed. They said would observe her over the coming months to determine if she's qualified for the slot.
Phoebe got so excited for being nominated to fill the spot that she didn't want to continue training Max anymore because she was afraid he would make a rookie mistake under her watch. So, Max made a fake Z-Force communication beam, saying that he is chosen for the same slot too. This increased competition among the Thunder Twins, leading to the destruction of Splatburger. Phoebe later figures out that Max programmed his watch to project the Z-Force hologram. President Kickbutt withdraws the twins' names for consideration for messing up and the Thundermans are banished from Hiddenville.
However, after Max and Phoebe risked losing everything, including their powers, to save Hiddenville from Candi Falconman, the Z-Force announces both Phoebe and Max Thunderman as finalists again to join the potential open slot, as a team.
The plot of this episode revolves around Phoebe and Max's Z-Force training. Max and Phoebe have been given money for Z-Force training equipment but Max uses the money to build a team headquarters for him and Phoebe. A Z-Force poster is also seen in Max's Lair.
The twins are submitting their special skills to the Z-Force. Phoebe has already submitted all of her skills. Max wants to enter gadgets development as his special skill and so he creates the Crimecaster which can predict future crimes. After doubting his skills, it turns out that the gadget actually works and therefore Phoebe agrees to enter Max's gadget development skills for the Z-Force application.
According to President Kickbutt, the Z-Force is fighting a giant, radioactive worm in the center of the Earth.
Z-Force sends a representative to interview Phoebe and Max as part of the Z-Force recruitment process. Unfortunately, Phoebe has injured her neck and legs while trying to help Cherry. So, the Thunder Twins enlist Cherry to pretend to be Phoebe for the interview. They dress Cherry in Phoebe's Thunder Suit, and teach her all the questions they expect to be asked by the Z-Force. D-Tail arrives and is easily fooled into believing that Cherry is Phoebe. He keeps complaining about how he didn't make it into the Z-Force. He later takes the "twins" on a mission, hoping to make a name for himself in the Z-Force. While Cherry distracted D-Tail by having him take a selfie of stopping the reactors, the real Phoebe helps to get them back to stable conditions. Max and Phoebe pass the Z-Force interview, advancing to the next stage.
Max and Phoebe get a special TV interview by Anderson Super, a popular Metroburg TV host, on their Z-Force progress. After learning about the upcoming Supe Awards, Max is concerned that a stink bomb he set as a prank back when he was evil could jeopardize their chances of getting into Z-Force. Both Phoebe and him are so concerned about losing their opportunity in joining the Z-Force that Phoebe ends up absorbing Dark Mayhem's powers from the power-sapping orb in order to be able to stop it. She successfully stops the stink bomb and secures the chance at the Z-Force. Unfortunately, the powers turn her evil.
Z-Force updates its rankings and unfortunately, Max and Phoebe are at the bottom of the list. They realize that it's because they're the only ones who didn't submit the "Lil Z Mentor Program" bonus assignment. The Lil Z Mentor Program is a special program where Z-Force hopefuls have to submit a video of themselves training a young superhero to take their powers to the next level. The Thunder Twins had missed the bonus assignment because when the Z-Force hologram announcement the assignment, Dr. Colosso was the only one at home and he refused to tell the twins. To complete the assignment, Phoebe and Max select Nora as their Lil Z. However, after seeing Billy's armnadoes skills, they secretly choose him over Nora. After learning what happened, Nora confronts the twins leading to a mega-disaster. Nora and Billy rescue the Phoebe and Max, after which the twins decide to work with both Billy and Nora as their Lil Zs.
The Z-Force sent a holographic letter to all the Z-Force hopefuls that the day after is the Z-Force Championships and Commander Dirk Trumbo advises them that they get the day off since its the day before the championships.
It's the day that the Z-Force championships take place. Super President Kickbutt tells Phoebe and Max that they made it into the championships. Z-Force sent beams to teleport them to the Z-Force Headquarters.
Commander Dirk Trumbo starts their first test which is they have to find a way to escape the gas in the room. Galexia steals the Phoebe and Max's idea and they manage to get out of the room.
Amazium lost his chance of getting in the Z-Force when he kicks a plate of egg rolls mistakenly thinking it was another test. The next test is the Power Derby. The rules are that you would have to force the opponent out of the ring with their superpowers. Whoever is out of the ring loses and don't go to the next test. The Thunder Twins, Galexia, The Gamer and Fantasto-Man made it past the test and Shield Girl, Sonic Boom, The Hipster Twins, Chronic Heat and Night Light don't. When Galexia fist-bumped Fantasto-Man, he went flying which means he was out. As a reward, the candidates get sent home.
When The Gamer finds out that his dad, Dr. Colosso, is being imprisoned by the Thunderman Family, he goes rogue and his aim is to make the Thunder Twins lose the final round. He uses Galexia to take the Thunder Twins out of the game. Phoebe throws an explosive coconut at Galexia so The Gamer won't have a grip on her. The Thunder Twins were capable of beating the Gamer and completing the tasks handed.
Even though the Thunder Twins won, Commander Dirk Trumbo was going to flip a coin because the Z-Force doesn't need two supes with the same power and because they don't have a "twin power". Phoebe suggests by accident that they should fight each other and whoever wins is on the Z-Force. Commander Dirk Trumbo takes her idea and Phoebe and Max fight one another. Phoebe could have won but she let her brother win instead. Max is officially accepted into the Z-Force.
The Z-Force gets their first mission where the Flame Brothers escaped from jail even though Max wants to go save his family. After Max went to Hiddenville to save his family and after they defeated Balfour, Super President Kickbutt arrived to tell the twins that the Commander is no longer the head of the Z-Force. Super President Kickbutt made the Thunder Twins the head of the Z-Force. Phoebe and Max recruited the rest of the Thunderman Family to be on the Z-Force since they were allowed to choose who they want on the team. Also, the Thunder Twins change the title Z-Force to T-Force, the t stands for Thundermans. The T-Force get their first mission where they have to stop a villain named the Brain Puncher.
- D-Tail - D-Tail is an interviewer for the Z-Force after he failed to be apart of the Z-Force when he got his tail stuck in a lift.
- Commander Dirk Trumbo - Commander Dirk Trumbo is the former head of the Z-Force. President Kickbutt fired him and turned him to her personal assistant.
- Thunder Twins - The Thunder Twins are now the current head of the Z-Force after Super President Kickbutt fired Commander Dirk Trumbo. Kickbutt made them head due to their consistent performance battling the Villain League and understanding the true heroism of a superhero.
The Z-Force was giving a new slot in 9 years. However, the Thunder Twins chose the Thunderman Family as part of their Z-Force organization. Below, are the candidates of who had the chance of being in the Z-Force.
Did not qualify for the Z-Force Championships
- Chronic Heat
- Night Light
Qualified for the Z-Force Championships but eliminated before Round 1
Eliminated in Round 1 (Power Derby)
- Sonic Boom
- Shield Girl
- The Hipster Twins
Eliminated after Round 1 but before Round 2
Eliminated in Round 2 (Triadome)
- The Gamer
Eliminated in the Max and Phoebe Mano a Mano Face-off
Won the Z-Force Championships
- Hank Thunderman was once rescued by the Z-Force after being stuck on the Statue of Liberty.
- The Z-Force is a recurring theme in Season 4.
- Max now has the Z-Force logo in his lair, starting from the episode Smells Like Team Spirit.
- After President Kickbutt made the Thunder Twins in charge of the Z-Force, Phoebe and Max change the title to T-Force. The T stands for Thundermans.