Doug is the father of Bridgette. He met Michael only a handful of times. Michael was able to convince him to participate in a prank to make Angry Grandpa think that he is Michael's real dad. After the prank, it was revealed to Angry Grandpa that he is actually Bridgette's father.
Doug helped Angry Grandpa fix his bed after Michael broke it during the "Hop On Pop" prank. He had a roll of duct tape in his truck.
In the "Meet Mr. Fix it!" video, it's revealed that Doug is a very good handyman, easily fixing Michael and Bridgette's garbage disposal and installing a screen on Michael and Bridgette's screen door. He installed Angry Grandpa's new door when he smashed it.