Question: Was Nina recruited as a spy before she joined CTU or after? Also, as she wasn't working just for the Drazens, what was her primary mission?
The End of Time: Part 3 - S1-E40
Question: Why did Gluto decide to freeze himself?
Answer: Gluto has quite a cowardly personality and never contributed too much in fighting against the Power Rangers. When he felt that the final battle was getting too intense for him, he decided that he would rather be frozen than participate.
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 ★