
Caleidoscope - S2-E4
Character mistake: The chess set in Dr. Pierce's home office is set up incorrectly. When the men are set up properly, each player has a light colored square in the right-hand corner. The board as it appears in the show is set up so that the light-colored square is in each player's left-hand corner. This "beginner" mistake puts the king and queen in the wrong positions.

The Family - S1-E6
Character mistake: The pharmacist says she's sorry, but they don't have the drug Lamotrigine in stock, so would the generic be okay?Lamotrigine is already the generic form of the drug Lamictal. (00:28:23)

Character mistake: Throughout the whole series Jin and Sun refer to each other as "yobo." The subtitles continually translate "yobo" as either "Jin" or "Sun" which is incorrect. "Yobo" is Korea's version of "dear" or "sweetheart."

Character mistake: Deputy Olmstead says to Lorraine Lyon, "You think that you're rich 'cause you're better than me." Surely, the line should have been "You think that you're better than me 'cause you're rich."
Suggested correction: No, she actually does mean Lorraine thinks she is rich because she is better than her. And to her, anyone who is not rich is therefore less, or else they would be rich too. It's the same type of thinking but with a different approach as what you suggest. It's about privilege.
Interesting. I can see it either way. Thanks for the thought.

The Short Day of Private Putnam - S2-E28
Character mistake: Hanley's call sign is Checkmate King Two. But his radio man recites, "Checkmate King Two, this is White Rook." Should have been the other way round.

Character mistake: When Billy Bones gives himself in to the redcoats, he states he is Long John Silver. In one of the next cuts, he talks about Silver in third person. The governor shows no shock and they keep talking as if Billy Bones had said at the start of the conversation who he truly was. Then he instructs the governor on how to take on "himself" and Flint.

Character mistake: On the witness stand, Janet Wilk speaks of moving "here to Lincoln City", but the episode takes place in Jackson City.

Character mistake: The way Henry takes Barry's blood pressure, he will not get any results. Neither the blood pressure cuff nor the stethoscope work reliably through clothing. As a doctor, he should know how to do it right.

Diary of a Perfect Murder - S1-E1
Character mistake: Prosecutor "Death Row" Hawkins finishes speaking with prospective jury member Mr. Cooper and tags in The Defense attorney, saying, "Mr. Matlock, your witness." Naturally, Cooper is not a witness of anything; they are selecting the jury.

Episode #1.2 - S1-E2
Character mistake: In the incident room Danny's height is written as 4ft 8inches / 112 cm. 4'8" is 142cm. (00:06:48)

Character mistake: Steffan addresses his brother, Daemon, as "Steffan" at The Grill after Ellina talks to Steffan about the crystal that plagues Bonnie with nightmares about Emily. (00:15:06)
Suggested correction: You missed the point of the scene. They were imitating each other. Stefan was pretending to speak as Damon. Damon replies with "I don't, Damon" and then "you're really hard to imitate".

Character mistake: There is a spelling error in the newspaper that Sakurako Sawatari is reading in one episode: the word, "admits" is spelled "adwits." (00:01:00)

Soft Target - S2-E6
Character mistake: On the roof, Don and the other agents have their weapons drawn on James Grace, who is holding Houseman hostage with the fake bomb. Once Grace is taken away, the threat is gone. But Don still has his gun pointed at Houseman, with his finger on the trigger. Houseman, while Don might think is a jerk, was innocent of any crime. There's no reason an agent like Don would have his gun pointed at him.

The Case of the Cheating Chancellor - S9-E4
Character mistake: Paul Drake tells Perry the "speedometer mileage" of a murdered man's automobile is 63,192. Speedometers do not show mileage. He meant to say "odometer."

Lovelines (aka The Eddie) - S6-E19
Character mistake: In the scene when Dr. Drew has Joey and Eddie on stage, they are arguing and Joey says that Eddie moved away and dumped her twice. Actually, he only dumped her once, when he moved out of his apartment and back home with his parents. The 2nd time that Joey is referring to is when Eddie moved to California for the writing workshop, which SHE helped and encouraged him to do. So he did not dump her 2 times; she basically pushed for him to leave the 2nd time, yet she acts as though this situation never occurred.

Character mistake: Roxy always calls her mother Marda, but in the first episode, she is on the phone with her and she says, "Mom, I gotta go."

Children of Earth: Day One - S3-E1
Character mistake: Lois says that Colonel Aduya's uniform "isn't British Army". In fact, it is entirely (and accurately) British Army with the exception of the small UNIT badge over the pocket.

Character mistake: Lindell is referred to as Captain Lindell; however, on his office wall, he has a Meritorious Service Medal Award that references Captain Greyson Lindell, USMC. The fact Lindell is a Marine, he should be recognized as a Colonel and be wearing a USMC uniform, not a U.S. Navy uniform. (00:26:43)

First Blood - S12-E9
Character mistake: Sam points out Elk Mountain, but there is no Elk Mountain in Rocky Mountain National Park.