Visible crew/equipment: Jack Bauer and his boss are in a building at night with a shooter hidden somewhere. They open a door and look very carefully to the right and then to the left before going through the door. On the right side you can briefly see two crew members and as the camera pulls forward they back up some so they won't be seen. (00:23:50)
Character mistake: 23rd minute. Jack meets the female assassin in Anderson's apartment. She demands that he show his credentials. Jack says he's with CTU on a provisional basis and therefore he has no badge. The agent that came with Jack confirms that. Yet, in the 13th episode (minute 14) when he enters the sports shop with Audrey's husband, he shows his CTU badge to the owners in order to prove that he in fact is a federal agent.
Continuity mistake: The 6:00PM-7:00PM episode ends when it is still light outside. The 7:00PM-8:00PM episode begins when it is completely dark (no sunset/dusk/twilight) The show is supposed to be in "real-time" but as the sun goes down it gradually gets darker, it does not just become dark from one second to the next. Also, the California presidential primary takes place in June. It is not even close to dark at 7pm in June.
Continuity mistake: When Jack drives to 18166 San Fernando Road he stops the car, gets out and leaves his phone in the car - you can see the green light of the phone's screen - he didn't reach for it. However, when Teri calls him, he has the phone in his pocket.
Continuity mistake: When Jack stops at the bus station to get a bag, we see a shot of Jack's car from the point of view of the guy who has the bag. You can see a quite big camera inside the car on the left side. When we see the reverse shot from inside of the car, the camera is gone. (00:05:55)
Continuity mistake: During season one of 24, Jack answers his mobile to Gaines and we see footage of Jack on a CCTV camera. The CCTV footage shows medical staff moving, yet when they cut back to the camera in the hall the medical staff are in different places, they keep changing places and keep disappearing and re-appearing and the CCTV footage is about two seconds ahead of the footage in the corridor. (00:31:00)
Continuity mistake: At about 2:15am, when Jack's talking to Nina about the passenger list on the plane, we see a shot of Jack in the top left, and Nina in the top right. Because it's real time they're both meant to match up - we're watching them both at the same time. In each shot we can see the back of the other's head, but while Jack is looking down and around in the left-hand shot, in the right-hand shot his head is staying perfectly still. (00:15:51)
Continuity mistake: In the previous hour, Pattie has long straight hair down to her shoulders. We see this all the way through, even at the very end. Yet at the start of episode 22, when she is now at the party a mere 10 minutes later, her hair is very much shorter. There is no way she would be able to get ready for the party in that time, let alone have her hair cut.
Factual error: When Edgar proves that Mary-Ann Taylor framed Sarah to be the rat in CTU, he claims that she remotely took control of her computer by sending the signal over "a plain old AC power line." This is not possible, unless the computers were equipped with special hardware to separate the AC from the signal. If they were, this traffic would have been observed by James Heller's assistant.
Continuity mistake: Mike Novik is briefing President Palmer about his phone call with Jack Bauer. In one shot Mike gets so emotionally involved in his speech to Palmer, a tear roles down his face and his eyes are glazed. The camera switches to Palmer, and in the next shot of Mike, his face is dry and his eyes are not glazed anymore.
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.
Plot hole: When Kim sees Gary she runs into the master bedroom, hides her bags, goes into the closet and up to the attic - all in the time it takes Gary to run five yards to the bedroom door. And considering how much noise the attic door made he should have heard her. Plus, how did she manage to get the door hatch closed when she had gone up?