Day 6: 6:00 AM - 7:00 AM - S6-E1
Trivia: Stephen Merchant, co-creator of "The Office" (original UK version) makes a cameo as a CTU worker who Nadia Yassir hands a document to. Merchant's co-creator/star, Ricky Gervais, also filmed a cameo as a presidential aide, but was eventually cut; Gervais' cameo is located in the deleted scenes on the DVD box set. (00:07:05)
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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