Principal Perry is in danger and the Lab Rats are at risk of exposing their powers to her and Davenport's business is ruined.
Principal Perry recruits Leo and Chase to help Trent study for an important test, but they use the opportunity to sabotage him. Meanwhile, Bree tries an experimental cream that causes her hair to grow out of control on school picture day.moreless
When Dr. Evans becomes entrapped in Davenport's secret facility, the team sets out to rescue him for the holidays.
Bree is tired of getting caught in the cross fire of the boy's pranks and with Tasha's help, setups a winning revenge prank.
Chase accidentally shrinks Adam when adjusting his strength levels and Bree becomes principal for a day.
The school is woefully behind the times and Davenport upgrades the tech including creating a mechanical Principal Perry which goes haywire after Chase adjusts it's settings.
When Leo's rival claims there's a ghost at the school, he and Chase decide to prank him until they discover it may be true.
When the school mascot costume is stolen by a rival school, Adam kidnaps their llama. Meanwhile Bree and Leo compete against Principal Perry and Caitlyn in dominos.
Adam is tired of not having time off from training, so Eddie convinces him and Leo to make a clone of Adam. Things go awry when the clones self duplicate.
Douglas returns to try to convince Chase to join him.
After getting in trouble, Leo tries to erase the previous day from Davenport's memory but accidentally erases the previous 24 years of his life.
When Marcus kidnaps Davenport, the team must try and rescue him which leads to a battle of bionic teenagers. The Shadowy figure reveals he is the Lab Rat's biological father.
When ultra-super rich Perry Hamilton and son Clayton move into the neighborhood, they make the Davenport family miserable just because they're rich. Perry challenges Donald to a stock car race for the deeds to their houses.moreless
When Adam gets a monster truck, Mr. Davenport doesn't think it is a good idea until he drives it. Unfortunately, he crashes it into the school and now Principal Perry has it.
When a priceless piece of art is missing, the rats must search everywhere to locate it.
Leo and Chase perform magic for the talent show while Bree watches Adam and her boyfriend, Owen, create butter art.
When Marcus catches Leo in his evil liar, Leo must find a way to escape and inform the team of the secret lab.
It's Leo's birthday and he soon becomes depressed when he discovers his parents aren't giving him a surprise party. The rats decide to throw one for him but get caught up in the party themselves.moreless
When Davenport declines the team request for a day off, they go on strike.
Chase finally succeeds in pranking Adam, causing Adam to get hurt and lose his self confidence.
Davenport destroys Chase and Leo's robot for a battle competition.
When Bree's obsession over a boy interferes with a mission, she is exposed to a toxin which risks destroying her bionics.
When the team is trapped in detention, Leo fills in to help Eddie and Davenport stop a toxic gas leak.
Leo accidentally releases robot flies.
When the space station gets damaged by a metor, the rats travel to space to fix it. Chase has developed a new ability to move objects with his mind.
The boys form a band with the new kid, Marcus, who for some reason destroys his own guitar and blames it on Leo. Meanwhile, Bree tries to bond with Davenport as father and daughter.moreless
When Leo is helping in the lab, he lowers the internet firewall allowing a computer virus to infect Eddy turning him into Teddy who reigns havoc during Bree's slumber party.
To impress Janelle, he signs up for a one-on-one basketball tournament. Chase helps him by providing Davenport's anti-gravity sneakers.
When Davenport's exoskeleton goes on a rampage, Leo's visiting grandmother almost finds out about the teenagers' bionic abilities.
The rats try to stop a runaway train but discover the device they need was removed by Leo sneaking aboard.