Corrected entry: When given the option of using intense light to kill the creatures, McCoy says that he could probably rig a cubicle in the bio lab to test the theory. However, that would require him to know engineering, and one of his caustic quotes is "I'm a doctor, not an engineer!", unless he requisitioned Engineering to help.
Correction: Rigging a cubicle with lights wouldn't require engineering skills. He just meant he can set up some intense lights and focus them on a certain spot, not that he'll have to wire anything or build a special device.
Corrected entry: As Kirk and co. carries O'Neil out of the alley, the supposedly unconscious woman in the black dress moves her foot out of the way as they pass.
Correction: The unconscious woman's foot did move, but not on her own - other cast members' feet caught and moved hers as they were exiting the scene.
Corrected entry: Garth, shape-shifted as Spock, applies the Vulcan nerve pinch to Marta. Since Garth can only imitate the physical appearance of someone and not that person's life experience, Garth would have no knowledge of the Vulcan nerve pinch. The same could be said of when Garth shape shifts into Kirk - if Garth had Kirk's knowledge, he would have known the counter sign that Scotty used to challenge him for the beam up.
Correction: Garth, prior to being able to shape-shift and going insane, was a well respected Starfleet Captain and skilled tactician. In fact, he was required reading at the academy. Captain Garth would no doubt have extensive knowledge of Vulcans and the Vulcan nerve pinch, including learning how to do it.
Corrected entry: The sword Spock is carrying disappears between leaving the cell and the group exiting down the corridor. No one else in the shot appears to have taken possession of it.
Correction: Spock does hand the sword to one of the submachine gun-armed guards before they are escorted down the corridor.
Corrected entry: Kirk and Spock pretend to be filming Daras so they can enter the building where John Gill will give his speech. Look at the lamp Spock is holding. In the beginning it works, than a couple of scenes later it doesn't, and when they are outside the chamber where John Gill is, his lamp is on again.
Correction: Spock turns the lamp off and on as needed, so it isn't a mistake.
Corrected entry: Not only do the billiard balls on the pool table keep changing positions between shots, but Bela seems to forget what the cue ball is for, and starts hitting the colored balls directly into the pockets instead.
Correction: Bela didn't "forget" the cue ball. He simply tired of playing around during introductions, and used the shooting of the regular balls as a signal that he was turning his attention to the matter at hand, i.e., Kirk and company, and what he could get out of them.
Corrected entry: Mira is supposedly weightless in the pressure chamber. But her tunic skirt remains perfectly flat and her long hair also "forgets" to float - it's hanging straight down below her head. Selective anti-gravity?
Correction: If she were lying flat on a surface, with her hair hanging down, when the anti gravity was activated, the cloth and hair would remain in this original position due to the absence of any gravity to affect their position. There are many videos of objects in weightlessness where astronauts placing an object in a spot in front of them, and it staying put, unless it were given motion from the touch of the astronaut.
Corrected entry: Kirk, McCoy, and Spock are chained to the dungeon wall, with McCoy noticing he is next to a skeleton, also chained. This is incorrect, as a skeleton's bones are held together by cartilage, which would rot over time. Therefore, the skeleton would not be hanging intact, but would be a pile of bones on the floor.
Correction: The dungeon and the skeleton are illusions specifically created to be frightening. Whether a real skeleton would remain intact is irrelevant.
Corrected entry: When Spock goes outside to scan the area he looks at the building directly in front of him, but when the child rubs away the dirt on the window Spock is seen looking at the ground to his right. But in the next shot Spock is looking directly at the building again.
Correction: When Spock comes out, and sends the guards off, he begins to look at, and scan with, his tricorder, and routinely glancing at the buildings, keeping mindful of possible attack in a possibly hostile situation. When seen through to cleaned spot, he is still performing the actions.
Corrected entry: Kirk orders Marple to cut around a rock to the right and make a noise to distract their observer. But the actor appears to slightly screw up his cue: Marple promptly traverses the rock to the left instead of the right.
Correction: Kirk indicated to Marple and Chekhov that someone or something was behind the rock that Spock nodded towards to show Kirk where their "friend" was. Kirk told Marple to "cut around the rock to your right", meaning the the man go around the indicated rock (behind Spock) so that his movements would be to his right, thereby keeping the rock to his right.
Corrected entry: When Nomad's bolt sends Scotty flying across the bridge, you can see the two rubber mats placed on the floor for the stunt man to land on.
Correction: There are no rubber mats anywhere for the stuntman to fall on. There was barely a second between impact and a person running to his side. He expertly landed in such a way as to avoid any major injury, save for a few bruises.
Corrected entry: When the android Kirk is created from the oddly short-legged blank, the turntable rotates to show Chapel the new Kirk - and the indentation on the other side suddenly disappears.
Correction: When the duplicator table turns for Chapel to see the new android Kirk, the indentations on both sides are there.
Corrected entry: Kirk informs Spock via communicator the Horta is ten feet from him, and Spock insists Kirk kill it. First, both know they cannot kill it with their phasers, and second, Spock's demand for Kirk to kill the Horta runs counter to the Vulcan philosophy of respect for all life. Spock would never want to harm, let alone kill, another life form.
Correction: At this point they don't have any proof that they can't kill it, and since Kirk is in danger, it's logical to try. Also, Spock is half human and he's concerned about his best friend being killed. Logical or not, he'll want Kirk to protect himself at all costs. Other episodes have shown where Spock doesn't always behave logically when his friends are at risk and he lets his emotions come out.
Corrected entry: We see our heroes paralysed by the alien belt machines, we then cut to the intro movie. When we go back to them they are being disarmed by the female alien. She takes something from McCoy's hand, yet before the intro he had nothing in his hands.
Correction: Rewinding more, you will find that there is an instrument in McCoy's hand, only concealed while wondering the arrived aliens.
Corrected entry: In the credits, Joan Collins' character is named "Sister Edith Keeler." But her character is engaging in a romantic/sexual relationship with Kirk. He says he has "ulterior motives" towards her which she reacts to playfully and kisses him. Not appropriate behaviour for a sister, particularly in the time and place the episode is set.
Correction: Edith Keeler wasn't a nun. She was a social worker, and thus, nothing she did would be considered inappropriate. She did work at the mission soup kitchen, where they would have called all women "sisters" just like they might call the men "brothers".
Corrected entry: When Plasus and two sentinels beam down to break up the fight near the mine, Plasus is on the end of the trio as they materialize. The camera angle changes as they step off the dais, and Plasus is suddenly in the middle.
Correction: When Plasus and the two sentinels are materializing on the landing pad, Plasus is between and behind the two sentinels (look at their feet in relation to the outer rim of the pad). The initial camera angle makes it a bit difficult to see, but the men are in fact positioned consistently during and after transport.
Corrected entry: Spock says they've only managed to punch holes in the force field large enough to fire through. But when the Enterprise fires, the force field (in the shape of Apollo's hand) is no longer there at all.
Correction: When the Enterprise fires on the temple, the force field IS visible. However, as they continue to fire and damage the power source, the force field starts to fade and flicker in and out, until it is gone.
Corrected entry: Spock wants Uhura to keep her eyes on the monitor every moment. (One fluctuation and Scott could die.) But he calls her name, making her turn away from the monitor and look at him, in order to tell her not to take her eyes off it.
Correction: Spock only gives her the instructions after Scott opened the access plate. Prior to that he gave no instructions for her to not take her eyes off the readings. Once Scott inserted the probe is when the magnetic readings needed to be monitored, calling Uhura's name and having her take her eyes off the monitor at that moment caused no danger (or plot hole error).
Corrected entry: It is easy to tell where the matte painting and live action area meet when Fox and the assistant appear.
Correction: How is this a mistake? Using matte paintings is a common technique used since the earliest days of cinema. There are many other examples throughout the series where they are used.
Corrected entry: In the sickbay near the end, Diana Muldaur got her line wrong, resulting in this contradictory dialogue: Kirk: "He'll die. But that's what you want, isn't it?" Miranda: "That's a lie!" Kirk: "Oh yes it is - you want him to die." Miranda's line was supposed to be, "That's not true," with Kirk's "Yes it is" contradicting her. As it stands, she claims it's a lie, and Kirk replies "Yes it is."
Correction: Kirk's reply of "yes it is" refers back to his statement of what Miranda wants - "that's what you want...yes it is, you want him to die". He's continuing his train of thought, not replying to her statement.