Day 2: 8:00 A.M.-9:00 A.M. - S2-E1
Continuity mistake: We see Kim having breakfast near the start. In one shot she has her fork in her hand. In the next she has a glass of juice. (00:11:45)
11:00 P.M.-12:00 Midnight - S1-E24
Continuity mistake: When the officer rings CTU about having Kim, Mason's hand is on his hip them the desk instantly. (00:07:30)
Continuity mistake: After the tracker has been killed, we see Jack holding his handcuffs. Camera changes and his hand is not holding the cuffs any more. (00:40:20)
Continuity mistake: At the start David is giving a speech about winning the primary. There is one point during a split screen where he grabs his microphone. However in the immediate next shot his hands are on the podium. (00:04:10)
Continuity mistake: When Kim hands the phone number to the cop, he takes it in his right hand. As he turns to walk away, its disappeared. (00:23:15)
Continuity mistake: We see Jack and Nina on the escalator and the people ahead of them get off at the top, camera changes to a shot from the top of the escalator and we see the previous 2 people getting off again. (00:21:00)
Continuity mistake: We see a black car driving down the street after the end of the scene between the two Palmers. In this shot you can see the passenger in the back of the car (Andre) is not on the phone. Camera changes to inside and Andre is on the phone. (00:15:50)
Continuity mistake: When Tony and Mason are having words about things being personal, there is one point where Mason approaches Tony and Tony's arms go from on his hips to down by his side instantly. (00:13:10)
Continuity mistake: We see Teri asleep with her head leaning back. Camera changes and now her head is leaning forward. (00:38:30)
Continuity mistake: As Elizabeth turns round to stab Drazen, he already has a blood mark on his shirt before being stabbed. (00:35:00)
Continuity mistake: Tanya chucks her number and 10 bucks down on the table. These items then proceed to change place without being touched. (00:07:50)
Continuity mistake: Elizabeth walks away from the security brief and puts her arm on the wall. When David approaches her, her arm is still on the wall. When the camera changes to the front angle, her arm is not on the wall any more. This is an instant cut. (00:06:30)
11:00 A.M.-12:00 Noon - S1-E12
Continuity mistake: Jack spits in Kevin's face to clear some of the blood. Between camera angles his face gets a lot cleaner instantly. (00:07:50)
Continuity mistake: When Dan's body is put in the grave, his shirt is only slightly raised up his chest. When they start filling the grave in, his shirt is raised a lot higher. (00:37:00)
Continuity mistake: When Mrs Palmer is walking towards the senator, she has her left arm outstretched in the front shot and not in the rear shot. (00:15:00)
Continuity mistake: Dan is shot at chest height in the previous episode. In this episode the gunshot is to the head. (00:04:20)
Continuity mistake: When Alan tells Teri he will stay with her until they find Kim, Teri's bag strap falls off her shoulder. Camera changes and the strap is back up on her shoulder. (00:32:30)
Continuity mistake: When Teri is talking to Alan about Kim failing Algebra, she has her hand on her bag in one shot and on her coffee in the next. (00:31:40)
Continuity mistake: When Alan gets out the car to ask the cop to speed things up his car door is open or closed depending on the shot. (00:15:15)
Continuity mistake: When Richard is shot and on the floor, there is a blood blob above his shirt pocket that keeps disappearing and reappearing. (00:35:10)
Answer: According to Jack in season 5, Nina was "deep cover" before the pair ever met, so it's safe to assume she was recruited before she joined CTU. As for what her primary mission was, who knows? Perhaps it was to gather sensitive intel and pass it on to her superiors. Given that she worked for an intelligence agency, it's not a stretch. Or perhaps we may find out in season seven.
Cubs Fan ★