The bomb in the CTU-HQ exploded about 40 seconds later than it should according to the real time concept.
George and the LAPD cannot break into the garage without a warrant that's signed by a judge.
After Mason has supposedly gotten completely naked for his decontamination, the waistband of his underwear is clearly visible for a split second.
When Barber falls back after being shot, a cameraman is very visible on the right side. (at around 16 mins)