Corrected entry: During the mashed potatoes scene, Lt. Valeris demonstrates that it's impossible to fire a phaser on board the Enterprise without setting off a ship-wide alarm. However later in the film, she murders the two assassins, Burke and Samnoe using, according to McCoy, "a phaser on stun at close range." Yet no alarm sounded in the ship, alerting the crew that a phaser had been fired on board. (01:20:50)
Corrected entry: If only two months went by between the explosion of the Klingon moon and the meeting at Starfleet Headquarters, when exactly did Chang and his cohorts have the time to construct the bird-of-prey that can fire while cloaked? Two months would not have been long enough to build such a vessel, and since there was no reason for the peace talks until after the moon exploded, there would be no reason to have such a vessel being built before the events of the movie happen.
Corrected entry: Valeris informs the crew that her comrades will make sure to jam ship to ship transmissions, yet minutes later the Enterprise is able to contact the Excelsior. In addition, why wouldn't the Excelsior contact Khitomer to warn them of the impending assassination attempt? (01:27:40 - 01:30:35)Teru_Kage
Corrected entry: When Lt. Valeris is exposed as a conspirator, she states to Kirk: "'Let them die' you said. Did I misinterpret you?" However she could not have known this, because when he said it he was alone with Spock (after the original mission briefing at Starfleet Headquarters). (00:11:05 - 01:23:45)
Corrected entry: Towards the end of the film, the Enterprise is getting an audio/visual transmission from Captain Sulu on the Excelsior. You see Captain Sulu on a big screen. Female Vulcan, Lt. Valeris, is standing right in front of the screen. You can see a ledge at the bottom of the screen, and her shoulders are even with the ledge, and she's near the middle of the screen. Then they switch to a shot of Captain Kirk, and then back to a closer shot of the screen. This time, Lt. Valeris has disappeared. You can see the bottom ledge and the middle of the screen. Then there's another shot of Kirk, then back to the screen, with Lt. Valeris magically back again.
Corrected entry: In the scene where Lt. Valeris finds the gravity boots, at the end of the scene she attaches them to the locker door. Just before she places the boots on the door, you can see velcro or some other kind sticky material on the locker door.
Corrected entry: After the first conference with the president of the Federation, all the men file out of the room, save Ambassador Sarek, who can be seen sitting in a chair beside the president's desk. In this shot, the president reaches for his eyeglasses. The very next shot cuts to the president taking off the glasses, showing the side of his desk where Sarek was sitting - but Sarek isn't there, and nor is his armchair.
Corrected entry: The character of Valeris was originally slated to be Lt. Saavik. The filmmakers tried to get Kirstie Alley back, but found out that her stardom in "Cheers" now made her too expensive. It was then decided that Saavik as she was known would never betray the Federation, so Valeris was created. This explains Valeris' infatuation with whether Spock is lying, as her words were originally Saavik's, mirrored in "The Wrath of Khan" (when Spock tells her, "I exaggerated," after she accuses him, "You lied.").
Corrected entry: In his log entry at the beginning of the movie, Captain Sulu mentions that he has been commanding the Excelsior for three years on a mission in Beta Quadrant. In the next scene, as they walk into the briefing at Starfleet Command, McCoy asks where Sulu is. Kirk has to remind him that Sulu is now a captain, and on assignment. It seems odd that McCoy wouldn't have known that, or that he would have expected Sulu at a briefing taking place very far away from the location of Sulu's mission.
Corrected entry: When the court is listening to the playback of Kirk's personal log stating he never could forgive the Klingons for the death of his son, General Chang is standing behind Kirk and several meters away. He asks Kirk if those were his words. Kirk says, "Those words were spoken by me." When Kirk's defense counsel objects, we see a wide angle shot of the room behind Kirk, and Chang is no longer there.wizard_of_gore
Corrected entry: In the scene where the Enterprise surrenders and Kirk and McCoy are about to beam to the Kilingon ship, if you watch carefully you can see Spock put his hand on Kirk's shoulder and place the tracking device there, which comes into play later when the Enterprise rescues him from the dilithium asteroid.