Continuity mistake: When Jack is outside Dunlop Plaza, talking to Nina on the phone, he says, "Nina, it's Jack." But the transcript Tony looks at a few seconds later reads, "Nina, it's me, Jack." (00:17:15 - 00:18:00)
Continuity mistake: When Senator Palmer is binding his tie in front of the mirror, he pulls the broad part of it completely through the loop of the tie around his neck. Than it cuts to a close-up and the broad part's part-way through the loop again. (00:30:05)
Factual error: When Janet enters the operating theatre, the surgeons put some x-rays on the light box. The x-rays are from a barium enema, which would have no relevance to Janet's injuries.
11:00 A.M.-12:00 Noon - S1-E12
Continuity mistake: In the shot near the end where you see Jack's family running away from the van, Kim is wearing sneakers. But until now, making abstraction of the other continuity error a few episodes earlier, she was wearing sandals. It can be seen in another scene afterward. (00:39:40)
Day 3: 11:00 A.M.-12:00 P.M. - S3-E23
Revealing mistake: When Sherry is shot, the impact is visible on her shirt, but no gunshot wounds can be seen on her skin underneath, which can be seen as she falls to the ground.
Continuity mistake: In Episode 15 (Day 1), the pregnancy test that Teri takes to the bathroom is a "TrueBlue" (close up shot on it), but the one that Kim finds there is a "ClearBlue". (00:13:07 - 00:19:57)
12:00 Midnight-1:00 A.M. - S1-E1
Continuity mistake: When Jack is on the phone with his wife as he is entering the CTU building, when you can see him in two different shots, he is holding the phone differently in each shot. (00:09:10)
Day 4: 11:00 P.M.-12:00 A.M. - S4-E17
Continuity mistake: When Jason and his wife are trying to escape from Marwan, they run through a corridor filled with water puddles. A few seconds later, one of Marwan's men goes through the same corridor to follow them, but none of the puddles had any ripples, which they should have considering the amount of water and time elapsed.
Day 3: 11:00 A.M.-12:00 P.M. - S3-E23
Visible crew/equipment: When Julie is pointing her gun at Sherry, to her rear in the top right part of the screen there is a black shiny wall panel. On this panel you can see man's reflection, who appears to be wearing headphones. His reflection is in the shot for several seconds.
Day 6: 9:00 AM - 10:00 AM - S6-E4
Revealing mistake: When Jack is forced to kill Curtis, Roger Cross flinches before the sound of the gunshot. (00:36:35)
Day 3: 8:00 A.M.-9:00 A.M. - S3-E20
Factual error: In the scene where Steven Saunders phones Tony Almeida to tell him Michelle Dessler has been captured, Steven tells Tony to open a "private web socket" to IP 257.211.16.5. Such an IP cannot exist, the maximum value for any single number in an IP is 255, anything higher like 257 is not defined. Real websites have been mentioned in the show before such as sylviaimports.com, making this reference a bit silly. Occurs at 39:38 in the episode.
Day 2: 6:00 P.M.-7:00 P.M. - S2-E11
Deliberate mistake: When Jack and that FBI team are looking for Sied Ali in the mosque, Jack finds a burning body in another room. He is led to believe that it is Ali, because the body's clothes matched the description that Kate Warner had given him. It is obvious that the skin is badly burnt, yet the clothes are barely scorched.
Day 4: 9:00 P.M.-10:00 P.M. - S4-E15
Plot hole: Dina Araz was executed at 8:57pmin the previous episode. At 9:01pm during this episode, the terrorists have already placed her body in the van, driven off with it, and abandoned it. Then someone had found the body, reported it in, and the information gotten to CTU. All in the course of four minutes. That is impossible, no matter how fast the terrorists were.
Continuity mistake: The show claims to be in real time, and although those viewers who aren't too eagle-eyed will argue that it is, there is undisputed evidence in this episode that it isn't accurate. After the final ad break, the clock reads 03:52. At least two minutes later, when we see Teri and "Alan York" turn a corner in their car, the clock is displayed at the bottom of the screen, and it is still 03:52. The same sort of thing happens earlier in the episode, when there is a good ten minutes or so between when the clock says 03:26 and when it says 03:30.
12:00 Midnight-1:00 A.M. - S1-E1
Visible crew/equipment: When Kim is going into the furniture store, whilst the door is closing you can see the lighting equipment reflected off the door. (00:11:20)
Day 2: 12:00 Midnight-1:00 A.M. - S2-E17
Factual error: When Yousef uses his Nextel to call Jack he uses the bleep button on the Nextel. Yet when Jack gives the phone to Wallace it is a regular call and not the Nextel bleep.
Day 4: 12:00 A.M.-1:00 A.M. - S4-E18
Factual error: In the opening scene of the episode, Marwan gives a cohort Lat/Long coordinates for a nuclear missile. The computer shows these coordinates as being in the Midwest, they are actually in Nevada. (37 14' N 115 21' W).
Day 2: 6:00 A.M.-7:00 A.M. - S2-E23
Plot hole: When Kim is brought back to the police station for the last time, the officer explains to her that they now know it was Gary Matheson who killed his wife, and that they are still looking for him. Why then, would Kim and her police escort not even consider the possibility that he might be hiding at his home when they arrive to get Kim's belongings? Even if the police searched the house once before, you would have to be insane to allow a teenage girl to enter the home of a known murderer on the loose. Beyond that, Kim herself never seemed to consider the threat.
Day 3: 2:00 A.M.-3:00 A.M. - S3-E14
Continuity mistake: Chappelle shows Jack the security footage of him shooting Nina. He shoots her three times. He fires the gun with more of a gap between the gunshots on the footage than he did when we saw him kill her.
Day 7: 4:00 PM - 5:00 PM - S7-E9
Revealing mistake: When Renee says she couldn't get the laptop to boot up due to a fried hard drive, the Windows desktop is visible on it, which meant that the laptop did boot up.
