Other mistake: They have a great electric fence, but the power goes out because of the storm. They all panic and flee the house, but the lights are still on in the house.
Other mistake: Kim and Al chase the suspect into a wooded area. As Al is walking through the woods there is a puff of smoke from behind the the trees in front of him, but the suspect steps out from behind him.
Cold Murdering Bastards - S3-E2
Other mistake: When we see the Royal Gazette, with the misinformation about Washington's death, the 2nd column is repeated in the 4th column.
Other mistake: When Lorne Malvo shoots out of the window the only thing sticking through the newspaper is the gun's barrel. When the shot changes to the scope view, you can see the outside. But you shouldn't be able to look outside.
Other mistake: Dr. Wade is the ME for Jefferson Parish. Most of the victims are found in Orleans Parish. Not her jurisdiction.
Things You Can't Outrun - S1-E3
Other mistake: When Cisco and Cailtin call Barry to tell him about the man with the gun, Cailtin says he has a gun. Cut to the cops pursuing him, the perp shoots at the cops, and one of them seems surprised that he has a gun. There's no way Caitlin could have known about the gun without the cop knowing (which would presumably have been relayed over police communications).
First Trap - S7-E11
Other mistake: Jack is taking photographs with a film camera that does not have an autowinder. He continues to take photos, but never winds the film.
Other mistake: During the transition scene after they're talking about the O'Shea video coming out and before Jerry is at the crime lab, there's a shot of traffic at night. But the film is ran backwards. All the cars are moving in reverse.
Other mistake: In this episode, Hera's ears are shown for the first time thanks to her civilian disguise. As for all Twi'lek women, they're shaped like cones. However, they are too large to fit under the ear coverings of the pilot's cap she usually wears, when they've been shown on the few occasions she hasn't been wearing goggles or a pilot's visor.
Other mistake: In first episode Wells apologizes for locking up Clarke's dad, then acts surprised when she tells him he got executed, when in episode 3 it's revealed they both assisted in the execution.
Episode #1.3 - S1-E3
Other mistake: The publican asks for payment for some drinks, saying "One and six, please", meaning one shilling and sixpence. The subtitles say "One-o-six, please."
Other mistake: While Gordon is a security guard, he has sergeant stripes on his sleeves but corporal stripes on his collar of his uniform.
Inspector Kenmochi the Murderer File 1 - S1-E19
Other mistake: There's a coloring mistake in the glass in front of Busujima in the shot when finishes playing his handheld game and sends the waitress away; the glass is half empty / half full...but vertically. The part to the right of the straw is full to the brim and the part to its left is nearly empty. (00:10:35)
Other mistake: When Happy goes to see if the backhoe will work to finish freezing the water she says the hoses are damaged. The hoses she indicates as damaged are the ac lines and hydraulic lines that hydraulic oil flows through - she does not even look at the water hoses. (00:18:40)