Leo Dooley
Leo d
Gender Male
Age 16 (as of Season 3)
Height: 5'2"
Nationality: American
Hometown: Mission Creek, IL
Professional Information
  Student/ Bionic Superhuman
Friends and Family
Donald (Step-Dad)

Tasha (Mother)

Adam (Step-Brother)

Bree (Step-Sister)

Chase (Step-Brother)





Love interests


Other Information
First Appearance
  Crush, Chop, and Burn
Portrayed by
Tyrel Jackson Williams
If I saved them...

And they saved the world...

That means I saved the world!

— Leo, Back From the Future
Leo Francis Dooley is the 16-year-old teen without any abilities (until Douglas made him bionic in You Posted What?!). He is considered a social outcast due to most circumstances considering his small amount of friends. Donald had a lack of trust for Leo due to accidental destruction caused by him, but has started to change his opinion (in Speed Trapped, he appointed Leo as 'the enforcer' to keep an eye of his siblings). He is Tasha Davenport's son, Donald Davenport's step son.

He is portrayed by Tyrel Jackson Williams.


Leo is the only non-bionic kid in the Davenport-Dooley Family. He is supportive of his mom's marriage to Donald Davenport. On their first day moving into his stepfather's mansion, he met AdamBree and Chase. He was attached to them soon and treated them as his own siblings. At school, Leo is considered the kid in the "bottom of the food chain" since he is one of the smart kids (Crush, Chop and Burn). However, with the help of his siblings, he was able to climb up the food chain and starts to get noticed in school.

Leo is loyal, caring, and intelligent. He has demonstrated these qualities in various situations, especially when his family is involved. In Season 1,  he showed his loyalty to his siblings by staying on their side despite the possibility of him getting hurt (Rats on a Train); by sacrificing his date with Janelle--and ultimately, his safety--when the possibility of them dying became imminent (Back From the Future); and by keeping their secret of using their bionics at school despite its end result of him not being able to go to an event he's been looking forward to going to (Mission Invisible). He shows that he cares for them and about how they feel in isolated events, like when he allowed Chase to redeem himself by letting him use his idea to defeat the exoskeleton (Exoskeleton vs. Grandma); when he apologized to Adam and Chase for showing them up at the dance (Leo's Jam); and whenever he bonds with Donald  (Can I Borrow the Helicopter?). His concern over their well-being can be seen more in Season 2. Upon Donald's request, he kept watch over his siblings, especially when they were around Marcus (Speed Trapped). After finding out the truth about him, he became more alert for them, even risking himself once again to prove to his family the danger that Marcus presents (Leo vs Evil). 

His intelligence and problem-solving skills have come to play in several instances. Using his knowledge of science and street smarts to stop a high-speed train (Rats on a Train) and applying the simple things he observes to drain out a toxic gas during a mission (Missin' the Mission) are two instances. Despite this, on several occasions he fails to take account of the potential consequences of his actions.

However, Leo can be manipulative and self-centered at times, which often stems from his unpopularity. He has taken advantage of his siblings' bionics multiple times. He has used Bree's view of him as her little brother to catch a ride to his classes and get his 'forgotten' homework (Smart and Smarter); Adam's super strength to win the school fitness challenge (Death Spiral Smackdown); and the father-son relationship he's formed with Donald to be able to see a movie his mother forbade him to see (Chore Wars).  Leo also quickly turns arrogant if things start to go his way, and acts stuck up, normally leading to him falling back to the ground painfully. He also often blows his achievements or duties out of proportion, making himself out as far more important, popular and successful than he really is.

Leo also has a habit of creating his own problems; for example, he got trapped in Principal Perry's private elevator, which he was using despite students being forbidden (Chip Switch) or him convincing Bree to misuse her bionic vocal manipulation leading to both of them being discovered (Bro Down), or disabling Chase's bionics and inadvertently amplifying his bionic aggression (Spike's Got Talent ). He also often lies, and uses lying to try and solve his problems, normally unnecessarily; however, this backfires on him as it has left others distrusting of, meaning he sometimes has trouble convincing them even when telling the truth, as demonstrated with his efforts to tell them Marcus is evil.

Leo is one of the main characters on the show. He is Mr. Davenport's stepson who knows about Adam, Bree, and Chase's bionics. His mother, Tasha, knows this as well.

Leo's enemy is Marcus. Marcus antagonizes Leo and threatens him since he considers him a hindrance to his plans due to his being aware of his hidden plans (Concert in a Can). Especially now that Leo's discovered their hidden lair, he shows more hostility towards him (Leo vs Evil).  

Another enemy of Leo is Principal Perry. Both of them have seemed to unlike each other from the start. In Chip Switch, they momentarily stand each other. Leo would like to stay away from Principal Perry at all costs, as she likes to punish him. (Missin' the Mission)

Leo has a crush on Janelle. In a possible future seven years from the present (seen in Back From the Future), Leo and Janelle are a couple. In Leo's Jam, he had a crush on Danielle, but he chose not to pursue that (in order not to hurt his brothers' feelings).

In Season 2(During Missin' the Mission) he became the team's strategic mission specialist.

Powers and Abilities

  • Enhanced Reflexes: Although he has no bionic abilities, Leo has 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 superhumans 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 life-long love of playing video games.
  • Intelligence: While not in the same class as Chase or Mr. Davenport, Leo is a very intelligent kid. With all of the advanced skills he's developing as a result of his new life, it's possible that Leo could become even more intelligent (in Back From the Future, the older, future Leo is implied to be the future Mr. Davenport's assistant).
  • Tactical Thinking: Leo has a gift for sizing up a situation and coming up with solutions, even while under extreme pressure. Also, because of growing up less sheltered than the other kids or even Mr. Davenport, Leo's instincts about people are far sharper, allowing him to size up people very quickly. (Leo immediately recognized Marcus as a threat, and Marcus, in turn, considered him a serious enough threat that he tried to eliminate him (in Speed Trapped) - and threatened him with exposing the entire family to the world when he couldn't eliminate him outright.)
  • Bravery: Despite his childish attitudes, Leo has a strong sense of courage. 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' laser vision.
  • Computer Knowledge: In "Night of the Living Virus," it is shown that that he seems to know how to hack into computers.
  • Electrical Generation (Parallel Universe): In "Parallel Universe," Leo gains this in the world where he is bionic. He harnesses the static electricity from his surroundings and utilizes it to create lightning bolts.
  • Super Speed (Parallel Universe): Leo uses this ability three times in "Parallel Universe," all in an effort to either escape or to defend Mr. Davenport and himself.
  • Super Intelligence (Parallel Universe)
  • Super Strength (Parallel Universe): This ability manifested once: when Leo tosses the keys to Tasha and he ends up shooting them through the door, knocking off the neighbor's mailbox.
  • Geo Leaping (Parallel Universe): In "Parallel Universe," Mr. Davenport reveals to Leo one of his newly uploaded abilities as they attempt to escape. Leo molecularly transports himself (and whoever he touches) from one place to another by thinking about his destination.


  • Physical Inferiority: Because he is so small and tiny, Leo is virtually physically weaker than most people.
  • Normal human: As he is not bionic and lacks the durability and abilities that comes with being bionic, he is constantly at a disadvantage in many if not all situations.
  • Self-defense incapability: Unlike AdamBreeChase, and Mr. Davenport, Leo is not taught in martial arts and does not know how to fight. He has to rely on technology or other things to defend himself. He is also considerably small, which is another problem.
  • Bully victim:  Because of his size and how unpopular he is, he is a very easily-targeted bully victim.
  • Inexperience: Leo's inexperience on missions makes him very vulnerable to danger.
  • Arrogance: Leo can be quite arrogant at times, especially if things start to go his way; more often than not he will blow his good luck by being arrogant and pushing it too far.
  • Creating his own problems: Leo has a habit of creating his own problems, although this is normally accidental and usually stems from him not understanding or atticipating the implications of what he is doing.
  • Clumsiness: Leo is always curious about something that can go wrong(as seen on Rats on a Train)


  • Leo was 13 years old until the episode, Bionic Birthday Fail when he turned 14.
  • He was probably born around 1998 since he is 15.
  • He likes annoying Bree.
  • Leo is so small that Mr. Davenport's self-driving car placed a child lock on the doors because it thought he was 9 years old.
  • Leo is greedy and likes money as he wanted "combat pay" to keep Marcus busy in "Mission: Space" and he wanted a raise on his allowance after he was officially made the team's strategic mission specialist.
  • He does not like art shows and finds them boring as seen in "Quarantined," when he complains to Bree about having no choice but to go fetch her at Owen's art show.
  • He is now the team's strategic mission specialist.
  • In "Bionic Birthday Fail," Leo temporarily had AdamBree and Chase's bionics in the simulation.
  • Leo calls Donald Davenport 'Big D'.
  • His mother knows whenever he calls her "Mommy," that he is hiding something.
  • Because of his lacking body, Leo is very and almost unrealistically weak. He could not carry or push Chase (Commando App), nor could he twist the sample container (Quarantined). In addition, he was unable to even lift Tasha's one-pound weights in The Rats Strike Back.
  • He can improvise well, shown in "Missin' the Mission."
  • He, along with Chase, always get teased for being short. But this doesn't stop him from mocking others for being short.
  • He has a hamster. (Mission: Space)
  • It has been rumored that Leo will have Bionics in Season 3 because Marcus shot a bionic chip in his neck in Bionic Showdown when he blasted him.
  • Leo had a goldfish, which Adam cooked(Adam Up)
  • The goldfish's name is Beyoncé
  • He calls himself "L Do". 
  • When Chase met leo he could not stand him.