Day 2: 5:00 P.M.-6:00 P.M. - S2-E10
Continuity mistake: You see Nina lying on the ground with a knee of an soldier in her back and you hear handcuffs - but when he pulls her on her feet her left arm is free. (00:04:15)
Day 2: 5:00 P.M.-6:00 P.M. - S2-E10
Continuity mistake: Marie Warner goes to see Reza at her father's office at about 5:30. When she enters the office, she puts her handbag on the table and embraces Reza. After they embrace she picks her handbag up from the floor next to Reza's chair. There was no time or opportunity for anyone to move her bag.
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.
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