Leo tries to show off his bionic arm to Janelle. Meanwhile, Agent Graham promotes the Lab Rats as bionic celebrities, but when they realize they missed a mission because of him, they decide to get Donald back as their leader by pretending to have glitches in their bionics to humiliate Graham in front of the President of the United States when he comes to visit them. In the end, Donald is back as their leader after Agent Graham is fired by the president, arrested by the Secret Service, and sent to prison.

The Lab Rats plan to gain good publicity by having cameramen film them during a mission, but it turns into a disaster when they fight for screen time. After the mission, the president orders the team to stay away from the public in order to let him settle things down. However, it goes wrong when Leo and Principal Perry are holding back angry protesters who want the Lab Rats gone, and Leo accidentally uses his bionic arm. As the protesters become even more enraged, they try to storm the house; Adam panics and uses his bionic super breath to blow everyone off the premises. However, Chase criticizes Adam's actions and the Lab Rats start fighting. They eventually decide to break the team. Three weeks later, the Lab Rats refuse to talk to each other, but they are forced into action when Krane plans to use his Triton App on everyone in the world. A large battle ensues, pitting Leo, Donald, Douglas, and the Lab Rats against Krane and his bionic army. Most of the soldiers attack Adam and Bree, who manage to take them out. Chase has a one-on-one battle with S-3 and Leo has one-on-one battle against S-1. Donald and Douglas attack the soldiers surrounding the satellite, but Krane keeps them from getting too close. Eventually, the Lab Rats and the rest of the team manage to hold back many of the soldiers, but they are running out of time to stop Krane. Douglas then reveals that the Lab Rats can fuse their abilities to stop Krane. They succeed, blasting Krane into the sky and breaking his control over the soldiers. However, their victory is cut short when they find out that Donald is in serious condition after the battle. Later they find out that after the surgery, Donald is still in a very delicate condition. Leo is made an official member of the Lab Rats and gets an upgrade to his bionic arm.

The Lab Rats plan to gain good publicity by having cameramen film them during a mission, but it turns into a disaster when they fight for screen time. After the mission, the president orders the team to stay away from the public in order to let him settle things down. However, it goes wrong when Leo and Principal Perry are holding back angry protesters who want the Lab Rats gone, and Leo accidentally uses his bionic arm. As the protesters become even more enraged, they try to storm the house; Adam panics and uses his bionic super breath to blow everyone off the premises. However, Chase criticizes Adam's actions and the Lab Rats start fighting. They eventually decide to break the team. Three weeks later, the Lab Rats refuse to talk to each other, but they are forced into action when Krane plans to use his Triton App on everyone in the world. A large battle ensues, pitting Leo, Donald, Douglas, and the Lab Rats against Krane and his bionic army. Most of the soldiers attack Adam and Bree, who manage to take them out. Chase has a one-on-one battle with S-3 and Leo has one-on-one battle against S-1. Donald and Douglas attack the soldiers surrounding the satellite, but Krane keeps them from getting too close. Eventually, the Lab Rats and the rest of the team manage to hold back many of the soldiers, but they are running out of time to stop Krane. Douglas then reveals that the Lab Rats can fuse their abilities to stop Krane. They succeed, blasting Krane into the sky and breaking his control over the soldiers. However, their victory is cut short when they find out that Donald is in serious condition after the battle. Later they find out that after the surgery, Donald is still in a very delicate condition. Leo is made an official member of the Lab Rats and gets an upgrade to his bionic arm.

Donald is in critical condition after the battle with Krane and his soldiers; Leo visits him in the hospital and in an attempt to save him, he risks his life to perform a dangerous bionic process, accelerating his aging process, thus turning him into an old man. Meanwhile, after being deactivated from the Triton App, Krane’s former bionic soldiers have nowhere to go and follow Adam home. The Lab Rats try to protect them because they aren't evil anymore. However, the president doesn't get this and tries to have them arrested, but changes his mind when the soldiers use their powers to heal and save Leo who almost died of old age. Right when they are going to be taken into custody, a newly healed Donald strikes up a deal with the president to build an academy for the soldiers.

Donald gives Eddy a human body and replaces his disrespectful personality to make him nicer. Perry restores his old personality, and he attempts to harm the students.

Donald tells the group that the president has decided to host an award ceremony because they have completed their one-thousandth mission and Leo wants his recognition, but it's only for the original members. Disappointed, Leo forms his own team with S-1, who calls herself Taylor now, and Logan.