Why didn't Lynn just get his stolen keycard deactivated and be issued a new one? The entire crisis in CTU could have been averted if he would have just gotten his keycard deactivated.
How did Lynn come back to CTU without his keycard?
The LED timer for the bomb says 1:12. But if you time the scene, it takes Curtis 1:17 to get the bomb into the hazmat containment unit, even though he says he has two seconds to spare.
Jack is carrying his satchel again. But the last time we saw it was in "12:00 PM -- 1:00 PM" when he gave it to the Secret Service men at the President's compound. How'd did it end up in Curtis' stolen car for Jack to get hold of it again?
When Lynn's sister Jenny is shot in the back of the head at the end of the episode, the slide on the killer's pistol never moves and no bullet casing is ejected. So in theory the gun didn't actually fire, the actor just simply moved his hand to simulate recoil (an understandable goof as firing a blank at such close range could seriously injure the actor).
The terrorist timed the canister to go off in 10 minutes around 5:45 PM but the canister went off at around 5:59 PM.
Why would the 'Deceased' stamp on Michelle's personnel file be so obtrusive as to cover up text, when all one needs is something that only takes up one line?
Henderson: That's right, Jack, start on my knee, just like I taught you! Sooner you do it, the sooner you see I don't know what you're talking about!
Pierce: Mike, I want you to know nothing happened in there.
Novick: Whatever didn't happen, make sure it doesn't happen again.
McGill: Damn it, Jenny, this isn't a laundry room. This is a secure government building.
Jack: Chloe, Henderson isn't trading music files with his office, there's something else on the computer, find it!