At 42:01 Carl Elias gives his birth date as August 18, 1965, and previously states his mother was killed when he was 4 years old. However, in The Fix (2011) Marlene Elias was said to have been killed in 1973. For Elias to have been 4 in 1973 is impossible unless he were born somewhere between late 1968 to 1969.
At 41:00, Fusco is holding his gun on no one, because he has already handcuffed all the bad guys.
Finch claims that "any speaker can be converted to a crude microphone by reversing polarity". That's wrong. Any speaker can indeed be used as a dynamic microphone by simply connecting it as one to an appropriate input, the polarity of the connection however is not an issue. By the way, the other way round also works: A microphone can serve as a speaker.