Dr. Simon Maxwell

Simon is Chase's grandfather who continues work on the time machine after Leonardo disappears. He travels through time to destroy his creation, but Chase accidentally follows him, Simon realizes that he has to find a way home.

He and Chase find themselves in 1776 where they are captured by Colonel Johann Rall, the leader of the Hessian mercenaries. They are interrogated then thrown into a cell. After a while, they are let out by Gerhardt, a cook who was unwillingly sent to the Americas to fight.

The two Maxwells escape and meet Clark, Shadow Fox, and Abraham, three scouts for Washington's army. They race back to camp and Simon and Chase meet Hamilton and Washington. Simon is needed as a medic; the only other medic in camp was Hugh Mercer.

Dr. Maxwell catches a cold while crossing the Delaware. He tells the men to melt wax on their gunpowder sacks so the powder does not get wet. This allowed for William to be able to shoot Rall at the battle.

On the way back from the battle, the time portal opens up and Simon gets sucked in along with Chase and the three Hessians chasing them.