In Space Elevator, Leo is promoted to Advanced. In Mission Mania we see Leo going on missions (Due to an ad he created). He gets a capsule for his arm in Under Siege. Leo is a beginner student but wants to be a mentor. Leo, along with his siblings, continue to live at the Davenport Bionic Academy. Leo is now a full member of the team, as he got a mission suit in Rise of the Secret Soldiers, and now goes on missions with Adam, Bree, and Chase. He gets re-located to The Davenport Bionic Academy in First Day of Bionic Academy, although was a student, unlike his siblings. Douglas also unlocked Leo's new ability, which is to absorb any energy source as he used it on Taylor to get his revenge. He later became an official member of the team. However, in Rise of the Secret Soldiers, Leo accidentally revealed his secret to an angry mob of protesters. Though his siblings' bionics were revealed to the world, Douglas urged him to keep his bionic arm a secret. He became bionic in You Posted What?!?, thanks to Douglas fixing his damaged arm. Leo also begins to create his own inventions rather than breaking his step-dad's ( Scramble the Orbs), though they have ended up causing damage. He had a change in personality being more responsible and trying to outsmart his opponents ( Trent for example). Leo, as Mission Specialist, is maturing in a higher stage. In season 2 Leo used one of Donald's inventions to travel to a parallel and acquired temporary bionics.

He tries to convince the Lab Rats that Marcus is up to no good. His knowledge allowed him to get promoted to a Mission Specialist. In this season, he matured into a fresher stage. He seems to help the Lab Rats more on mission rather than getting them into trouble. He becomes more responsible, and tries to stay on Donald's good side. He meets his future self in Back From the Future. Leo and the Lab Rats became friends easily and Leo had to save the Lab Rats for a numerous amount of times. He meets the Lab Rats and introduces them into the real world and takes them to school.

In this season, Leo is in his clumsy phase of life who is still trying to fit in at school.

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