Leo Francis Dooley is the main protagonist of Lab Rats. He is Adam, Bree, and Chase 's stepbrother and their closest friend. He is one of the five main characters and is the team's Strategic Mission Specialist. He is considered a social outcast in most circumstances considering his small amount of friends.

Tyrel Jackson Williams (born March 16, 1997 [2]), also known under the stage name TJOnline (formerly TJW) is an American actor, rapper and singer. He starred as Leo Dooley in the Disney XD series Lab Rats. Williams also co-starred in the 2014 Disney XD television film Pants on Fire. From 2017 to 2020, he co-starred in the comedy series Brockmire.

Leo Dooley is the main protagonist of Lab Rats and one of the main characters of The Lab Rats Chronicles.

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.

Leonard "Leo" Francis Dooley is an entirely bionic human in a parallel universe and a counterpart of Leo's non-bionic self. In Parallel Universe, he was temporarily replaced by the regular Leo, who received his bionics for that time.

Leo Dooley is a short, normal kid who wants to be popular. He is excited to have a billionaire dad and new bionic siblings. Leo is constantly messing things up and then winds up helping Adam, Bree and Chase to fix everything.

Leo is an ordinary teenager who has moved into a high-tech "smart" house with his mother, inventor stepfather and Eddy, the computer that runs the house. Leo's life becomes less ordinary when, one day, he discovers a secret underground lab that houses three experiments: superhuman teenagers.

In this season, Leo is in his clumsy phase of life who is still trying to fit in at school. He meets the Lab Rats and introduces them to the real world and takes them to school. Leo and the Lab Rats became friends easily and Leo had to save the Lab Rats numerous amount of times.

My new dad is Batman! The image gallery for Leo Dooley may be viewed here. Community content is available under CC-BY-SA unless otherwise noted.

Future Leo (2019 Leo) is the future version of Leo Dooley, and he is 7 years older than the original Leo. He was sent to the present by a time machine invented by Future Donald.