Hey, don't worry, guys. We'll be back together before you know it.
„
~ Leo's final words to Bree and Chase in The Vanishing.
Leonard Francis "Leo" Dooley is the deuteragonist of the Lab Rats franchise.
He is a 17-year-old bionic teen who is Adam, Bree, and Chase's step-brother and their closest friend, and the team's Strategic Mission Specialist. He is considered a social outcast in most circumstances considering his small amount of friends. Donald had a lack of trust for Leo due to Leo's tendency to accidentally destroy things, but has started to change his opinion, as he made Leo the team's "Mission Specialist." He gained a bionic arm in You Posted What?!?, after his right arm got extremely injured by Taylor. He gains a bionic leg in Space Elevator, when the elevator crushes his left leg severely. After the defeat of Giselle Vickers and Marcus Davenport, Leo went to go back to the Bionic Academy to oversee the students' progress with Adam while Bree and Chase headed to Centium City to be the new members of The Elite Force.
In You Posted What?!?, Douglas recreates Leo's right arm with bionic technology, replacing damaged parts of it with bionic components. Leo's right forearm is bionic and all bionic abilities Leo has are in his arm, as he has no bionics fully integrated into his nervous system, as his bionics are not directly connected to his brain or in his neck. Douglas made a remote deactivation function to control Leo's abilities. In Space Elevator, Donald recreates Leo's left leg with bionic technology (superhuman strength) because it was broken by the elevator and he was afraid he couldn't go on any missions.
Bionic Arm: Leo received this bionic arm after Taylor crushed him in You Posted What?!?. This was his first time receiving Bionics other than Parallel Universe. It is shown that Douglas recreated Leo's right arm with bionic technology to replace his original, damaged arm. It's current known capabilities, according to Douglas, include:
Laser Sphere Generation: In You Posted What?!?, according to Douglas, Leo can generate laser energy and form them into laser spheres from his fingers and shoot them from his hand. This is also Leo's main bionic ability as being the one he uses the most. It is also strong enough to knock out Krane and they can set things on fire. The laser bolts can knock out powerful bionic humans, such as Taylor, or even Krane as stated above, or blast objects to pieces or blast aside metal.
EMP Generation: Leo discovered a brand new bionic ability where he can combine laser spheres with another bionic person (usually Taylor) to generate an EMP to knock out any electrical equipment.
Superhuman Strength: Just like his big brother Adam, Leo's arm and leg are shown to have superhuman strength. In You Posted What?!?, he accidentally used his arm to crush Perry's hand, making it become swollen. in Armed and Dangerous, Leo uses his bionic strength to lift up the couch with one hand without visible strain in a similar manner to how Adam lifted it one-handedly. Also, like Adam, he was not visibly discomforted by the weight of the couch and balanced it well in his hand. In Bionic Rebellion, Leo used his super strength to throw Tank out of the window. However, some metals take him a while to break with his arm. In Space Elevator, Donald gives Leo's Left leg superhuman strength because it was broken by the elevator, and he was afraid he couldn't go on any missions. In Space Elevator, Leo used his leg to kick the basketball at a great stance and when it bounced back it knocked Donald down. In The Vanishing, his bionic leg was shown to be stronger then his bionic arm, being able to tear through steel wall, something his bionic arm only put a dent in.
Super Durability: Leo bionic arm and leg are more durable than his non-bionic limbs.
Energy Transference: This is one of Leo hidden abilities until Rise of the Secret Soldiers. Douglas unlocks this ability for him to fight the bionic army. This ability can absorb any type of energy source and it can be used medically (though this is highly discouraged due to the life-risks). Leo defeated Taylor for the first time with this ability. While Leo used the ability to heal Donald, it's not clear if it can be used to bring a dead person back to life. He can also absorb kinetic energy, which was how Leo was able to catch the falling space elevator.
Bionic Leg: In Space Elevator, Donald gives Leo's left leg bionics because it was broken by the elevator, and he was afraid he couldn't go any missions. The only known capabilities include super strength as shown when Leo kicked the basketball a great distance using his leg and when it bounced back, it knocked Donald down. Leo used this to sent Human Eddy flying into a wall. (Human Eddy) His leg was shown to be even stronger than his bionic arm, being able to tear through a steel wall, something his bionic arm only put a small dent in. (The Vanishing).
Non-Bionic Abilities
Peak Human Reflexes: Before he had bionics, Leo had reflexes that are far superior than the average person, which allows him to easily dodge and/or deflect laser bolts (even from weapons geared to destroy super humans and controlled by a supercomputer), and redirect those laser bolts to strike even small targets with pinpoint accuracy (as he demonstrated in Night of the Living Virus and The Rats Strike Back). He says that he developed those reflexes because of his lifelong love of playing video games. His reflexes might come to the fact that he's short and light weighted.
Bravery: Despite his childish attitudes, Leo has a strong sense of courage, even facing Marcus by himself and an stamps to fight Douglas. He also stood up against Krane and Taylor despite them being more dangerous than any enemy Leo and his family faced, as he quickly backed down when Krane threatened to hurt him. In Back From The Future, he didn't hesitate to push all three siblings to safety when they were nearly killed by falling debris (almost being killed himself), and in Missin' the Mission, he went into a dangerous situation to help Mr. Davenport stop a toxic gas leak (while Adam, Bree and Chase were being kept in detention at Mission Creek High School by Principal Perry). Leo also stood up to Marcus, even after being threatened with Marcus's laser vision. In Taken, Leo stood up against Douglas, thinking he was the threat. In Rise of the Secret Soldiers, he was able to battle Taylor, whom he was once afraid of. He fought in the Bionic War and goes on mission to save people. He even underwent a rescue to save his mother
Peak Human Intelligence: While liable to make foolish decisions, Leo is quite intelligent due to experience working with Donald in the Lab, though he's nowhere near as intelligent as a doctor, and is more knowledgeable in technology than in other fields. In school, he's the smart kid. In Scramble the Orbs, he successfully designs programs and can build floating, spherical, robotic bodyguards, however, he forgot to give them the capabilities to tell the difference between a real threat and a playful one.
Multilingualism: Leo can speak Spanish and Chinese, though he's bad at French.
Wise Cracking: Leo usually defends himself with smart remarks and sassy comments.
Leadership: Despite everything, Leo is a capable leader, having been able to take charge in the Hurst Memorial Bridge rescue mission when saving his family. He was able to lead Taylor and Logan on saving his family.
Martial Arts: It is shown that Leo can use martial arts like the Lab Rats, though it seems he can only use martial arts when he was bionic. However, in Taken he used it to try to take down Douglas, who points out how bad Leo is at it.
Skilled Fire-Staff Fighter: In Alien Gladiators, he is seen beating many competitors in the competition even the most skilled ones. He is a formidable fire-staff warrior and even defeated Donald Davenport, who is very skilled in martial arts, weaponry, and fire-staff, itself.
Skilled Marksman: Leo is said to be a terrible shot, especially in the Episode You Posted What!?! where Leo stated he had poor coordination. He was able to accidentally hit a metal barrel off its stand and hit Krane spot on the head though he was not intending to hit them with his arm. However, when Leo was training with Douglas, he managed to hit at target board three times in a row. His aim was off when he had to harpoon a spider but couldn't do it until Bree took over. However, Leo's aim seemed to have improved through training, and because he was able to fire at the liquid Bionic serum without much trouble.
