Douglas Davenport is the creator of Marcus, Adam, Bree and Chase, and the one who gave Victor Krane bionics. He is first seen in the Season 1 finale Mission: Space as a shadowy figure. He was the "Big Bad" for Season 2. He was formerly evil and Donald's younger biological brother who wanted to kidnap the Lab Rats and activate their Triton Apps to become his bionic soldiers creating mayhem in the world. He was one of the two founders of Davenport Industries, but then got booted by Donald for wanting to use bionics for evil, or more accurately, to commit crimes. He now lives with the Lab Rats and has not been evil. After Donald founded the Bionic Academy, Douglas has been trying out as head of the Academy's Research and Development department, and he is usually left to take care of the Academy while Donald was out.
He is portrayed by Jeremy Kent Jackson.
His comments imply he was a nasty man from childhood, bullying his brother and stealing his fathers money. However, it was later revealed that being mocked by Donald his whole life, and that how people only respected Donald, and everyone looked down at him in comparision had turn Douglas into a bitter and aloof scheming genius bent on vengeance and hatred. At some point over seventeen years ago, he and Donald started Davenport Industries, together they worked on bionic technology, to allow robots to do things humans couldn't do. However knowing robots would burn out quickly, he went behind Donald back and genetically grew three humans, then implemented the Bionic technology into the children. These children where Adam, Bree and Chase. The Bionic technology was never meant for humans, thus why they glitch. Douglas planned to use them as Bionic super soldiers and sell them off to the highest bidder, be they warlords or dictators.
Discovering his brothers evil plan, Donald took the children away from him. Douglas faked his death to escape from the authorities (and there mother, who they both agreed never stopped calling). Donald took Adam, Bree and Chase in and unable to remove there Bionics, raised them as his own, knowing if he raised them right, he make sure they would use there bionic powers for good rather than evil as his brother had intended.
Douglas shares many traits with Donald. Both men are geniuses who are very arrogant and possess a very large ego. However, unlike Donald, Douglas was formerly ruthless and uncaring; he had no problems with turning children into weapons, starting wars and causing destruction if it benefited him. He was completely amoral, devious and willing to do anything to benefit his goals. Back then, he only cared about succeeding in his goals and benefiting himself, through various underhanded and illegal activities. He also didn't have any problem with the idea of murdering children if they got in his way, thus making him a truly evil man, but he has developed a change of heart, and now helps the Lab Rats fight villains who are as evil as he used to be, especially Victor Krane who he seeks revenge on for double-crossing him. He even stands up for the Lab Rats when Donald is wrong to be angry at them.
He did seem to have some level of care for Marcus, his creation; the two had a strained father/son relationship. Nevertheless, he had no problems with the fact that Marcus was not going to last till his sixteenth birthday, as androids burned out quickly, and seemed to regard him as little more than a weapon. He was shown to be impassive once Marcus had been presumed to be dead once the lair had collapsed.
Strangely enough, the one thing he cared a lot about(Besides his creations) was his dog Otis, whom he took in as a stray and gave bionics to.
Despite his more sadistic traits, Douglas did have a lighter side; he's pretty reckless, like Donald, and often berated him in a childish manner, such as stealing his catchphrases and calling him "Donny," which Donald hated. He once called his brother out on a past disagreement for consistently breaking his toys. He states that he possess "much better hair" than Donald Davenport and equates to his level of intellect. He also loves music, which is seen throughout the series.