
Character mistake: The Enterprise is targeted by projectiles from the planet. Spock identifies them as "plasma torpedoes", and Captain Pike reacts with surprise; "Plasma torpedoes? That's 21st century tech" and from that they all establish that the civilization they contacted is not yet capable of warp drive. Plasma torpedoes are the main weaponry of the Romulans centuries later, and Earth itself did acquire warp drive in the 21st century, so this claim and deduction don't seem to add up. (00:22:15)

Character mistake: A computer display of currency transactions shows the word "withdrawal" spelled as "withdrawl." (It is also spelled correctly higher up on the display). (00:25:05)

Character mistake: After Nick kills Calvin, and Travis arrives, Nick calls Travis "Nick" before correctly calling him Travis in his next line of dialogue.

Is There Honey Still for Tea? - S8-E3
Character mistake: When Mainwaring and the others are discussing how to break the news to Godfrey about his cottage, it is mentioned that the roof is made of thatch. However when Mainwaring, Wilson and Pike go to visit Godfrey, the roof of his cottage can be seen and it is slate, with no thatch anywhere in sight.

Old Wounds - S1-E1
Character mistake: After Mercer's speech to the entire crew he dismisses everyone except for the senior staff but everyone, including the senior staff, starts walking away as if they were dismissed as well.
Suggested correction: They were walking away, but not as if they were dismissed. The group of senior officers and Mercer are in a completely different part of the room (or possible an entirely different room). Notice the doorway where Mercer is standing. At the beginning, he's in the doorway and it has a white boarder and a 2nd set of doors. Then he's standing in front of a doorway with a blue boarder and no 2nd set of doors.

It Happened 'That Night' - S3-E1
Character mistake: Emily's mom tells Emily that reporters were there to talk to them about "Emily's missing remains." It's supposed to be "Allison's missing remains." (00:17:00)

Log 1: The Impossible Mission - S1-E1
Character mistake: They turn left onto Moorpark St and they say into the radio they are going east on Moorpark. However, the street sign shows they are going west. (00:10:30)

Character mistake: Tig gets bit on the right butt cheek. Tara tells Chibs to give him a local, which is a numbing injection so she can stitch him up. Problem is that Chibs does the injection in the left butt cheek. You are supposed to give the injection close to the wound to numb it before stitches.

Character mistake: This mistake happens in the town meeting scene. They are talking about the two business owners that dated, then moved when it ended badly. It hurt the town's economy. First it was said that Faye sold flowers and the guy sold candy. Then they said that Faye sold candy.

Character mistake: The sign in front of the tank Lt. Ladd is trapped in reads "ORDINANCE TESTING FIELD, DANGER.", but an ordinance is a type of decree or law. They probably meant 'ordnance', which is another word for artillery.

Character mistake: Gaz is reading a magazine. It is not a real magazine, except within the storyline. There is a full-page picture of Johnny and the headline "Competion winner".

Character mistake: The math test Tina gets a D on has #5 marked wrong. However it is correct. (Additionally it seems improbable she would actually get #3 and #4 wrong since she obviously understood the concept of how to do the problem and only had a problem with the division for some reason, and these questions didn't require division).

The Way of the Warrior (2) - S4-E2
Character mistake: During the Defiant's flight to save the Cardassian officials, Worf says something to the effect of, "I've never been aboard a Federation ship equipped with a cloak before". However, he was aboard the Enterprise during the Pegasus incident, where The Ship was temporarily equipped with a cloaking device.

Character mistake: Brandon begins the scene giving his speech while he is sitting/leaning on the desk. The students all move into the picture from both sides and gather around Brandon then they all say, "There's No Hope With Dope". After the conversation with Mr. Belding, they watch the commercial they just shot (beginning with each student giving his/her opinion about drugs). Then Zach says his speech while sitting/leaning on the desk. He stands up, the rest of the students and Brandon move in and gather around Zach, then Brandon gives his anti-drug speech.

Hercule Poirot's Christmas - S6-E1
Character mistake: After Japp's arrival, when Poirot walks up the stairs with the two male detectives, at one point he says "Mais no madame." ("But no mylady.")

Character mistake: When Sav asks Ali if she wants people to think she's not good enough for their family, Ali accidentally calls Sav "Ray" when she responds: "Yes, Ray, that's exactly what I want." Raymond "Ray" Ablack is the name of the actor who plays Sav. (00:17:31)
Suggested correction: Actually she says: "Yes. Right, that's exactly what I want." Not "yes Ray."
I know the subtitle says "right", but I hear "Ray" as well. Plus, it fits better in the line for her to use someone's name. Usually when someone is sarcastically agreeing they'll say "yeah, right" or "yes, [person's name]."
Yeah, it doesn't really make sense for her to say, "Yes, right" like that, and neither the intonation of her voice nor movement of her mouth match it either. The subtitles most likely said "right" to cover up the mistake.

Character mistake: Det. Baldwin Jones calls ADA Valerie Haywood Teresa. (00:49:10)

Character mistake: Beverly waves a university brochure in Adam's face and tells him he's going to go "to UCLA. That's in Hollywood." UCLA is in Westwood.

Character mistake: Marissa said to Ryan (in episode "The Brothers Grim") that the last time she was in Chino, she "saved his ass". She was referring to Thanksgiving, but that's not the last time she was in Chino. The last time she was in Chino was in "The Nana" when she ran there after finding out about Luke and her mother's affair.
Suggested correction: She saved his ass when she talked to Eddie about letting him stay. So her phrasing is correct.

Article Two - S5-E19
Character mistake: During Garth's Filibuster, the Marvel characters come into the Star Wars universe because Thanos is using the Infinity Gauntlet's Reality Gem to cross realities. The gem allows the wielder of the Gauntlet to MOLD reality to his desire, but an Infinity Gauntlet does not work outside it's home universe/dimension, so Thanos wouldn't be able to "jump from different realities" with it. Someone that well-versed in the Marvel Comics universe would know this.
Suggested correction: Travis is the one who says "Nick".