Day 8: 4:00 P.M. - 5:00 P.M. - S8-E1
Revealing mistake: When Farhad Hassan brings the press ID for Meredith Reed to security, you see the guard walk through the metal detector wearing his police belt, but the metal detector does not go off, showing that it's either not real, or not turned on.
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 ★