The series stars Billy Unger, Spencer Boldman, Kelli Berglund, Tyrel Jackson Williams, and Hal Sparks.
When growing too nervous or angry, he activates his Commando app, which causes him to glitch and turn into Spike, a second personality who is rude and destructive.
Coincidentally, Billy Unger is skilled in martial arts and hand-to-hand combat, making portraying the role of Chase easy.
In "Brother Battle", Douglas gives Chase a new bionic ability: a bo staff that is also a laser which he can create with his fist.
In the series finale, he and Bree take part in Davenport's next experiment, which involves working with superheroes, as seen in Lab Rats: Elite Force.
Adam (Spencer Boldman) is the oldest and most powerful of the team, with superhuman strength, making him one of the strongest men on the planet.
His first hidden ability is revealed in "Bionic Showdown", where he generates a powerful force of electricity called a blast wave in order to save Leo from Marcus.
In "Brother Battle", Douglas gives Adam a new bionic ability: pressurized lung capacity, an extremely powerful wind which he blows from his mouth.
Bree (Kelli Berglund) can move at over 400 miles per hour, create a sonic cyclone, jump exceptionally high, and stick to walls and ceilings.
In the series finale, she and Chase take part in Davenport's next experiment which involves working with superheroes, as seen in Lab Rats: Elite Force.
Douglas gives Leo bionic abilities after his right arm is badly injured during a fight against Krane and S-1 at Mission Creek High.
Chase, Adam, Bree, and Davenport are shocked when they figure out that Leo has bionics when he knocks out Krane by blasting him during a fight.
In "Rise of the Secret Soldiers", Leo accidentally exposes his bionic arm in front of an entire mob of angry protesters while trying to get them to leave the house.
In "Bionic House Party", Leo transfers most of his energy to Davenport in order to save him, which causes him to turn old and nearly die.
In "Lab Rats: On the Edge", he becomes a mentor when he saves everyone, including Douglas, from a collapsing bridge after help from a reformed S-1, who is now known as Taylor, and Logan.
Donald Davenport (Hal Sparks) is the billionaire inventor who is Leo's stepfather and older brother of Douglas.
In "Rise of the Secret Soldiers", Davenport gets seriously injured after battling Krane, resulting in him going to the hospital and having surgery, and it is unknown if he survives his injuries.
In the series finale, Davenport begins his next experiment which involves two members from the team working with superheroes, as seen in Lab Rats: Elite Force.
Davenport creates a synthetic body for Eddy, with an altered personality to help Perry with her security job.
In "Sink or Swim", she helps Leo, Davenport, and Tasha by letting them stay at the school so she can get her money sooner.
In "Unauthorized Mission", she quits her job and manipulates Davenport so that he will let her work as the chief of security at the bionic academy.
Trent (Eddie Perino) is the bully and jock of Mission Creek High, who has an ongoing feud with Chase, Adam, Bree, and Leo.
He has competed against Chase, Adam, Bree, and Leo in football and basketball and somehow always seems to come out with the short end of the stick.
In "Trent Gets Schooled", he graduates thanks to the help of Chase and Leo; however, much to their shock, Perry hires him as the gym teacher.
In "One of Us", it is discovered that Krane had installed a doomsday virus in the Triton app, which would cause the bionic soldiers to self-destruct to prevent anyone else from controlling them in case he dies.
In "Space Elevator", he almost fails the first semester, but Perry helps him become tough and he moves up one level like everyone else and is now intermediate.
He is a goofy and obnoxious boss who likes technology, which is shown in "Scramble the Orbs" when he gives a $500 Tech Town gift card to an app contest winner.
Troy West (Leo Howard) is an android with bionics who was created by Giselle, Douglas's ex-girlfriend, to act as an action film star.
However, Chase, Adam, Bree, and Leo fight back and Giselle is defeated when she accidentally wraps her electric whip around herself.
He has been living a normal life with an adopted family and never knew that he had bionics until his siblings accidentally activate his chip while taking a group photo.