The truth behind Marcus and his father.

In an effort to get out of training duties, Adam enlists Leo's help to create a duplicate Adam using Davenport's experimental cloning device. However, Adam's clone uses the same device to create another duplicate to avoid going to school and the clones he creates repeat the same process resulting in a mob of ever duplicating Adams.

When the school mascot's Dingo costume is stolen by the rival team, Adam seeks revenge by taking their mascot, a llama. When Chase and Adam try to return the llama they discover that the animal has swallowed hundreds of Davenport's mechanical nanobots causing it to shoot acidic bionic spit.

Chase inadvertently causes Adam to shrink down to two inches.

Adam, Bree, and Chase sneak out to meet Marcus in Davenport’s new self-driving sports car. When Leo tries to stop them, his nemesis Marcus traps him inside the car and programs it to take him on a wild, high-speed ride bound for the bottom of the Pacific Ocean.

Leo follows Marcus to his secret lair (an abandoned train station) to gather evidence that proves he's bionic but ends up captured by Marcus and told that there bionics are just some dumb tricks. Meanwhile, the Lab Rats scramble to bring Tasha back before Davenport finds out that they accidentally teleported her to parts unknown.

Davenport races Joey Logano.

When Leo discovers that his nemesis Trent is rattled about a ghostly legend at Mission Creek High, he comes up with a plan for Chase and Adam to use their bionics to stage a haunting at the school.

Leo and Chase use Davenport's technology to get back at Trent on the day of a big test; Bree gets exposed to a hair growth cream with bad results.

Adam gets a truck. Leo tries to get her mother out of being PTA teacher.

When Mr. Davenport invents a new freeze ray gadget, he sends the Lab Rats on a mission to Antartica to collect ice-type fuel for his invention. But when a 'category 5' storm hits Antartica, he calls the mission off. Ignoring Davenport's orders, Chase goes anyways, alone and gets trapped in an avalanche after it collapsed on him. When he tries to find a way out, he runs into Douglas along the way. Meanwhile, Leo tries to impress Janelle, but accidentally freezed her using Davenport's freeze ray gadget.

Bree is exposed to a toxic chemical sending Adam and Chase on a mission for an antidote. Bree escapes quarantine and when her side effects kick in, it's up to Leo to get her back to her capsule.

When Chase is not pictured on the yearbook, he enters a talent show to show everyone he's popular by using his bionics to move a chair with his mind. But Leo messes with Chase's bionics and he was mad so he got revenge by going into commando app and then he messes with the kids in the school which causes Davenport to turn off his bionics until he learns his lesson.

The Lab Rats accidentally damage Davenport's one million dollar painting.

Adam, Bree and Chase use Mr Davenport's new invention to erase moments that could land them in trouble. While, Leo causes chaos when he uses the gadget to accidentally wipe 24 years of Mr Davenport's memory, resetting him to his 15 year old self.

Adam's confidence plummets after Chase pranks him, so Chase tries to make things right by creating a fake rescue scenario, but his plan backfires and puts him in real danger.

Leo turns to Bree for help after he mistakenly unleashes a swarm of robotic flies on the school. Adam and Chase turn their class assignment into a destructive competition.

The lab rats go on strike and express their desire to do normal teenage stuff, so Davenport recruits Leo as a "scab" rat for an upcoming demonstration.

Chase and Leo enter a robot battling competition.

One of Davenports inventions accidentally sucks Leo into an opposite parallel universe where Leo's the one with Bionics, Principal Perry is nice, Adam is a nerd, Chase is a Jock, and Bree is popular.

Bree is tired of being the target of the boys' pranks.

Principal Perry gets the idea to create a robotic version of herself.

Leo finally goes a mission as he helps Davenport and Eddy attempt to stop an underground gas leak. Adam, Bree and Chase struggle to escape from Principal Perry’s detention lockdown.

The Lab Rats go on a rescue mission to save Dr. Evans and travel to Davenport's secret facility in the frozen tundra.