Meanwhile, Leo is almost late for one of his school classes. Before Otis leaves, Bree and Leo are still fighting about the phone and accidentally drop it; they lose interest after Otis pees on it. Later, the Davenports are in the limo on the mainland, heading for the awards ceremony. Douglas eventually restores the students to their original selves and is convinced that it is best not to increase their intelligence, as doing so also alters their personalities and interests. Leo learns they have lived their whole lives in the lab, where they have been training their bionic abilities for future classified missions. Davenport says he is proud of them, and they view him as their real father. The day of the launch, Chase performs a bionic scan of the elevator and finds a major flaw on the elevator's braking system.
During filming, Bree stops Troy before he can fire a blaster gun at Chase, Adam, Leo, and Douglas. Adam pretends to be infected with the virus so he can get close enough to inject Chase and Bree, thereby curing them. The students wear outfits with specific colors to indicate their level of experience with their bionics, and Leo is annoyed that Davenport keeps moving Spin up another color level. Archived from on November 14, 2015. Archived from on January 31, 2015. Later, Marcus reveals to Leo that he is bionic like Chase, Adam, and Bree and that if Leo tells anyone, Marcus will tell the world about Chase, Adam, and Bree's secret. Chase and Adam's pranks start getting out of hand when Tasha gets sprayed in the face with ketchup and mustard after she opens a cupboard.
At school, Perry announces her retirement as principal now that she has her hush money from Davenport, but Leo is upset to learn that Trent has been hired as the new principal. However, when Trent steals the shoes, Chase uses a gadget that makes the shoes dance with Trent in them. When Perry learns that Chase, Adam, and Bree use their bionics for missions, she repeatedly insists that they take her on one of their missions. Leo competes to win the contest in hopes of riding the world's first anti-gravity roller coaster at Minsk's new tech theme park. She plans to kill all bionic people and replace them with her androids, but she is upset to see that Adam, Bree and Chase are still at the academy.
When they return, Chase reveals that they barely made it out alive and because Bree is no longer bionic, the mission took twice as long. As Leo figures out a way to keep his new pals' bionic abilities a secret, they help him build self-confidence. Meanwhile, Marcus disables Eddy and he and his father capture Davenport. The crew consists of bionic Chase William Brent and Bree Kelli Berglund along with Kaz Bradley Steven Perry , Oliver Jake Short and Skylar Paris Bereic who join forces after the Mighty Med hospital is burned down by the bad guys. Meanwhile, Bree and Leo agree to help Caitlin win in the school's competition, but they realize she is obsessed with winning. Later, during the night, Perry is attacked by a mysterious attacker; in the morning, Chase notices bionic burn marks on the hydro-loop and has suspicions that there is still a rebel among them from when Sebastian led the bionic rebellion.
The finale episode of this season was. Douglas agrees to let Daniel visit the academy, but he lies to Daniel by claiming that Chase, Adam, Bree, and Leo are his cousins and Davenport is his uncle, in order to keep Daniel's bionics a secret from himself. Davenport repeatedly sends Perry away from the island, but she keeps finding ways to return. At night, Leo turns on Davenport's device, thinking it is a nightlight. However, once the three of them are home, they are put under the control of Douglas's Triton App and attack Davenport, Leo, and Tasha. As revenge, Leo tells Chase about a new that is actually nonexistent.
However, after Chase's group fails at defeating the exoskeleton suit and defusing a virtual bomb, Chase decides to find a way to cheat and win. Eventually, all of the duplicates are destroyed. After realizing how dangerous the world can be, Adam becomes overly concerned about safety and eventually decides to quit the team to avoid getting hurt again. However, Davenport believes that Douglas is using Krane to assist him in another trick. Kaz tricks the Incapacitator to absorb Chase's virus and the Incapacitator explodes.
Giselle is intrigued when Douglas mentions Marcus, saying he was his greatest invention who had the combined abilities of Chase, Adam, and Bree. However, Leo convinces Bob and Spin to help him escape the training room. They get there and fix the breach, but Adam accidentally breaks his tether with his heat vision and Bree ends up rescuing him, with help from Chase and his newly discovered ability. Chase, Adam, and Bree convince Davenport to send them out to stop the train, marking their first mission after years of training. After Trent graduates, they find out he is now their gym teacher. Ryan, to work on the world's first space elevator, which travels along a tether and can bring occupants up to space stations.
Meanwhile, Leo accidentally freezes Janelle and Tasha with the freezing gun. The spider escapes and bites Adam, which poisons him. However, Douglas reveals that he has already given Bree the ability to become invisible. They are surprised to find Perry there, and they become suspicious when she acts paranoid. Davenport then lets Leo use Davenport's helicopter to take Janelle on a date. After the ePhones are sold out, Chase realizes his phone is being used in the store as a display model.