Gunpowder, Treason and Plot - S2-E10
Factual error: The Battle of Monmouth is shown. There are no leaves on the trees even though the battle was fought in June. In fact it was so hot there were more British casualties from the heat than from battle. It looks like it was filmed on a very cold day in autumn.
Hard Boiled - S2-E2
Revealing mistake: The blood pack is obvious as Benedict Arnold is shot in the thigh.
Thoughts of a Free Man - S2-E1
Continuity mistake: When Caleb comes to Ben's rescue while he's being beaten Ben first is not wearing his coat then he is, then he's not again. (00:27:35)
Men of Blood - S2-E4
Factual error: The show starts out as being November 14th (1777), which was a Friday. However, Abraham tells Ben it's Monday.
Thoughts of a Free Man - S2-E1
Continuity mistake: As Abraham Woodhull toasts his father, the alcohol in his glass changes quantity between shots.
Hard Boiled - S2-E2
Other mistake: Simcoe is in a shop with several other redcoats. They are making jokes at him. He receives a package with a knife inside. While he is inspecting the knife one of the off camera soldiers that is joking makes the screeching sound from Psycho. I though I was hearing things at first and replayed it to make sure. (03:41:00)