Character mistake: Horatio writes the symbols for sulfuric acid, H2SO4, on a clear board. Both numbers should be subscripts but he writes the 4 as a coefficient (which precedes the name of the acid but he writes it after), suggesting a lack of basic chemistry knowledge.
Episode #9.3 - S9-E3
Character mistake: Tariq says "I ran a probability logarithm." This makes no sense: it should be "a probability algorithm." (00:17:35)