Continuity mistake: After Bones finishes examining Charlie, they move to the door and Charlie begins to put his jacket back on. In the side shot, he gets it on and begins to adjust it around his shoulders when it cuts to a frontal view. Suddenly his arms are relaxed like he's already had the jacket on for a few seconds and in a comfortable position. (00:05:18)
The Man Trap - S1-E2
Continuity mistake: When the creature makes it's way through the ship and finds McCoy's room, it stops near the wall with a red vent behind it. It changes back to Nancy in a dissolve cut, but suddenly it's much closer to the walk and is now closer to the vent, something that would not have happened by a simple morph like seen before. (00:28:45)
The Man Trap - S1-E2
Continuity mistake: When Kirk is telling Crater that he needs him and his wife to stay on their ship till he finds out what killed his man, Kirk has his arms crossed. When Crater steps up to him and the angle changes, Kirk's arms are suddenly down at his side. This continuously changes back and forth between shots. (00:18:07)
The Man Trap - S1-E2
Continuity mistake: Kirk jokes with Bones after they land about flowers and is holding some hay or grass in his hands. After Bones makes the comment about bribing girls, Kirk lowers his hand off screen but with the grass still in it. It jump cuts to a different angle from further away and suddenly his hand is empty, and there is no grass on the ground where he could have dropped it. (00:00:57)
Continuity mistake: When the computer opens and begins operation in Gary Seven's office, it's white. In the close up, it goes from white to purple when asking for identification. Afterwards, the color continues to change.
The Immunity Syndrome - S2-E18
Continuity mistake: At the shuttle craft deck, Spock is standing on the same side of the door as McCoy, then moves to the other side. When McCoy looks at Spock, he is standing on McCoy's side of the door again, then is back on the other side when the door opens.
The Return of the Archons - S1-E22
Continuity mistake: After Kirk and the landing party beam down, they are met by a man who tells them where they can stay for the night but they will have to hurry because it's almost the "red hour." At that time the camera shows a clock that reads 5:58. After being introduced to the daughter of the man who can give them shelter, a gong rings and magically it is 6:00, 2 minutes later, although only 32 seconds of real time has passed. (00:05:18 - 00:05:50)
Continuity mistake: Spock is standing in the background with his back to the wall and his hands behind him. A few seconds later, the shot changes to him deep in the "Plak Tow", with his left shoulder touching the wall and with his hands intertwined. The next shot has him standing with his back against the wall again, hands behind his back again. The scene would have flowed nicely if they hadn't inserted the "Plak Tow" shot in between. That two second clip had been used already a few minutes earlier. (00:33:03)
Continuity mistake: While Kirk, Spock, and McCoy attempt to escape, Merik contacts Enterprise with the stolen communicator and the Proconsul stabs him, then when Merik tosses the communicator it lands in front of Kirk's feet in a closeup. The problem is that in the closeup Kirk is wearing his black uniform pants, but during this scene Kirk is wearing the light colored slave pants. Also interesting to note, when the sword landed on the floor in front of Spock's feet, the Vulcan is wearing black lace-up flat footwear instead of his black uniform boots. (00:46:35)
Continuity mistake: When Scotty, Kirk, and the others follow Spock's signal to the chamber with the Controller, they encounter Kara and she activates their pain bands. Spock's body has a pain band around his waist as the other men drop to the ground, but after McCoy tells Kirk, "Spock, no pain," the pain band is missing from Spock's body, then in the next shot it reappears when he goes after Kara's bracelet. (00:35:05)
Continuity mistake: When Kirk and his landing party beam down to the planet there are six shots of Morg, who have their right arms covered in fur in all those flipped shots, but when Morg attack the landing party it's their left arms covered in fur. Presumably, the first six shots were flipped for direction continuity. (00:13:15)
The Ultimate Computer - S2-E24
Continuity mistake: During the scene with the ore freighter, there are four closeups of Spock while he's bent over the scope at his station, and in the background behind Spock we can see Kirk and others on the bridge are gone. It also occurs in the earlier scene during the encounter with the two starships. (00:24:00)
Continuity mistake: When Kirk and Mara are in the transporter room for intraship beaming, Kirk is wearing his usual Starfleet boots with heels, but while Kirk and Kang are fighting Kirk is wearing flat bottom boots. (00:43:25)
Continuity mistake: When Kirk and McCoy join Spock and Galloway on Exeter's bridge, McCoy kneels down and uses his med tricorder with its strap crossed over his shoulder, but in McCoy's closeup the strap is gone, then next shot the strap is once again over McCoy's shoulder. (00:04:25)
Operation -- Annihilate! - S1-E30
Continuity mistake: After Kirk orders Uhura to reestablish contact with Aurelan's transmitter, when Uhura replies that they do not acknowledge her contact signal, Uhura's communications earpiece is not in her ear, but in the next shot it's suddenly back in her ear. (00:06:10)
Continuity mistake: When Kirk informs Galileo that all systems are clear for takeoff, in the shot from inside the shuttlebay as Galileo turns to launch, the shuttlecraft Columbus is also in the hangar deck, but when Galileo exits Enterprise the Columbus is gone in the exterior shot. (00:01:45)
Continuity mistake: When Kirk confronts Spock in his quarters, Kirk asks if it's something only his planet can do for him, then Kirk uses his left hand to grab hold of Spock's arm as he drops the stylus, but in the closeup it's Kirk's right hand holding Spock's arm up, and that stylus is also back in Spock's raised hand. (00:12:25)
The Gamesters of Triskelion - S2-E16
Continuity mistake: When Kirk, Uhura, and Chekov enter the transporter room Kirk is wearing his usual boots with heels, but while they're on Triskelion during some scenes Kirk's boots change to boots with flat rubber soles.
The Gamesters of Triskelion - S2-E16
Continuity mistake: During the final match, while Kirk fights the lone Andorian thrall two things to notice. Kirk's collar of obedience opens up and drops between the two opponents, then when Kirk lifts and flips the Andorian thrall the back of Kirk's black pants are split open in the wide shot. Both the collar and pants are intact in following shots. (00:45:25)
Continuity mistake: After Maab gives Eleen back her life and forfeits his own life, when Keel throws the kleegat and hits Kras he drops the phaser in the closeup, but in the next long shot the phaser is back up in the Klingon's (stuntman) right hand. (00:45:50)
Answer: Kirk was getting his physical and Dr. McCoy probably turned off communications, because if he hadn't, Kirk would have left and headed straight for the bridge, leaving McCoy irritated.