On several occasions, it is stated that the French fought the "British" during the Hundred Years War. This should be English. The Battle of Agincourt was fought in 1415 and Joan of Arc's campaign against the English occurred in 1429, both centuries before either the personal union of the British crown under James I and VI in 1603 or the political Act of Union that formed the Kingdom of Great Britain in 1707.
After Will's raid on the crack house, D.A. Fellowes calls the DEA the Drug Enforcement Agency instead of the Drug Enforcement Administration.