Day 4: 5:00 A.M.-6:00 A.M. - S4-E23
Continuity mistake: In the first scene where we see Tony as a hostage, Mandy comes over to him and he has a white gag in his mouth, which is taut. Mandy says, "Is she gonna do the same for you?" and the camera cuts back to Tony, whose gag is now limp on both sides.
Day 5: 7:00 A.M.-8:00 A.M. - S5-E1
Continuity mistake: Season 5 Episode 1 Hour 07:00 A.M. The bad guy goes for Chloe and starts running at full speed close to the door (15 steps?) at 00:17:24. After 9 seconds "running," he barely is at the door. (00:17:25)
Day 5: 9:00 A.M.-10:00 A.M. - S5-E3
Continuity mistake: During Episode 3 of Season 5, the terrorists take Derek in front of live television. When the terrorists force him on his knees, you can see a splatter of blood on the floor from the body of the last victim that was shot there. As time is running out, another shot of Derek being held by the terrorists is shown, and the mere splatter of blood that had been near his knees is now a noticeably big pool of blood. Nobody has harmed Derek yet, and there are no signs that he is bleeding. So where did all that blood come from?
Day 5: 11:00 A.M.-12:00 P.M. - S5-E5
Factual error: When Mrs. Logan escapes, Aaron Pierce refers to her as "the First Lady" over his radio. The Secret Service has code names for each of the members of the president's family. He should have used her code name when communicating to other Secret Service agents about her.
Day 5: 11:00 A.M.-12:00 P.M. - S5-E5
Plot hole: Martha Logan told Evelyn about the transcript and hid it in her bra in front of her. Yet when Mrs. Logan later tells her husband about it Evelyn doesn't seem to have any idea what she is talking about. While it can be considered a character choice for Evelyn not to speak up, there is no reason at all why Martha, who is so desperate for her husband to believe her, doesn't ask Evelyn to verify it.
Day 5: 11:00 A.M.-12:00 P.M. - S5-E5
Continuity mistake: Season five, 5th hour. Lynn knows about the four people who knew Jack was still alive, he mentions their names and talks to Jack about it. Yet when they are told Tony wants to speak with Jack, Lynn looks completely puzzled and Jack tells him that he knew Tony. Minutes earlier Lynn already knew that.
Day 5: 1:00 PM - 2:00 PM - S5-E7
Continuity mistake: In the "Previously on." montage, Ivan Erwich tells Walt Cummings "Your country is about to pay a very steep price for betraying us." But at the end of the previous episode, Erwich never says "for betraying us."
Day 5: 1:00 PM - 2:00 PM - S5-E7
Continuity mistake: When Spenser tells Jack that someone else is in Rossler's penthouse, he says "In the bedroom to your right," but Jack then glances to his left.
Day 5: 5:00 PM - 6:00 PM - S5-E11
Plot hole: This is the first time we see the contact between the boyfriend of Lynn McGill's sister and the terrorists regarding Lynn's keycard. There is no reason they would know each other. (00:06:10 - 00:06:50)
Day 5: 5:00 PM - 6:00 PM - S5-E11
Continuity mistake: When Agent Aaron Pierce steps out of the helicopter, the right half of his face is severely wounded, with lots of blood and a bandage on it. 12 minutes later, when he is back in the Presidential house, he's talking with Miss. Logan and his face is completely clean, with not a single scratch or sign of wounds on his right half of the face. (00:12:55 - 00:25:00)
Day 5: 8:00 PM - 9:00 PM - S5-E14
Other mistake: When Jack enters the empty hotel room of Colette and Theo, a chair is rolling across the floor to the right of the screen.
Day 5: 9:00 PM - 10:00 PM - S5-E15
Continuity mistake: Season 5 - 9pm-10pm, at 9:41pm. - Technical weapon error. When Jack takes the Federal Marshal's' Glock pistol, in an effort to add drama, he holds the pistol in his right hand and cocks it with his left hand by grabbing the slide, pulling it back, and releasing it to chamber another round. However, after he does this, the camera zooms in on the gun as it is pointed at Colette's' head and you can see that the slide is still back on the gun and NOT capable of firing at all.
Day 5: 1:00 AM - 2:00 AM - S5-E19
Factual error: When Chloe is at Bill's, she brings up the details of the diplomatic flight, and it shows the aircraft as a Boeing 757-200. This is a twin-engine aircraft, but the one shown is a tri-jet.
Day 5: 3:00 AM - 4:00 AM - S5-E21
Audio problem: In the scene where the President Logan is in his office and planning to take his own life, he gets a phone call from CTU's Miles Papazian. When President Logan answers the intercom, his voice sounds like he is the one talking through the intercom, eventhough the camera stays on President Logan. After answering the intercom, his voice changes back to normal.
Other mistake: During the explosion from the tape recorder, there is a very short explosion shot recycled from a previous season (when Christopher locks Jack in a bunker and tries to kill him with a bomb placed in a clipboard). This old footage is also seen when that tape recorder explosion is shown on recaps of the event in season 6.
Day 6: 6:00 AM - 7:00 AM - S6-E1
Deliberate mistake: Jack is tortured by having a nerve stabbed, and then having acid thrown on it. But in the next episode, when he is chasing the bomber, he is perfectly fine.
Day 6: 7:00 AM - 8:00 AM - S6-E2
Other mistake: At 7:45 Ahmed leads Scott out of his house at gunpoint so he can go to Scott's house. At 8:14 they arrive. But Scott's house is just across the street so we're supposed to believe that it takes half an hour to cross the street.
Day 6: 8:00 AM - 9:00 AM - S6-E3
Visible crew/equipment: When Jack gets into the black SUV with Curtis, as they pull away two crewmembers are visible in the reflection on the side of the vehicle.
Day 6: 8:00 AM - 9:00 AM - S6-E3
Continuity mistake: When Jack slams his carjacked SUV into the terrorist's car, only its driver's side door acquires damage, but when it cuts to a close-up the car also has substantial damage over the front tire.
Chosen answer: Nobody knew, not even the writers, until at least halfway through the season when they were writing the end. They wanted to keep all options open.
Nick N.