Douglas and Leah

Douglas and Leah are former enemies turned rivals turned close friends and allies.

Douglas Davenport
As children, Douglas was often bullied by his older brother and overshadowed by him. He attended college, during this time, he was dating Giselle Vickers. However, she broke up with him, causing Douglas to be heartbroken and one of the most worst days of his life. He later went to study to be a doctor, but he immediately fainted due to his fear of needles.

In 1992, Donald and Douglas started Davenport Industries, creating technology and sent androids on missions that were meant to perform things impossible for humans to do. However, Douglas went behind his brother's back and engineered four humans and infused them with Bionics: Adam, Bree, Chase and Daniel and hoped to create a battalion of bionic soldiers and using them as weapons, or at least, sell them to terrorists and dictators. Donald figured out what his brother was up to and promptly disowned him, taking Bree, Chase, and Adam away with hopes of raising them and use their powers for good.

Losing his three eldest children, Douglas gave up his youngest son up for adoption to ensure he had a normal life (And Then There Were Four). Faking his own death, he led his brother and parents to believe he had died and FBI began hunting them down. .At some point, he found a stray dog, Otis, and put bionics in him to save his life while plotting ot get his kids back.

He was aware of Leah due to spying on his brother before officially meeting her in Sins of the Father.

Leah Davenport
Leah Dooley was born 1999 to Tasha Davenport and James Dooley. As a five-year-old, Leah's father had abandoned his wife and daughter, wanting to find a better life for his family. She tried warning her mother against online dating but found Donald as someone who deserved to make her mother's life happy. However, her relationship with Donald was slightly strained because of her past issues with her own father, who had never returned home. At thirteen years old, she was already living in her step-father's house.

She developed a strong relationship with her bionic siblings, Adam, Bree, and Chase and was unaware that Douglas existed and was the kids' real father.

Power Play

 * Douglas initially remains neutral when Leah and Davenport fight each other about the baby. However, he knows that the baby is Chase's and his granddaughter.
 * Leah tells Douglas that she does not want to lose her child, and that a man like Douglas should understand because he lost Bree, Adam and Chase and Marcus. He sees what she means and promises to support Leah's children,
 * Douglas wants Leah's baby to be a boy but Bree disagrees and wants the baby to be a girl because they need to have more girls because only Bree and Leah were the only girls in the household.
 * He helps her get to the infirmary and is there when Leah announces her daughter's name as Ella.