Eu saí da primeira temporada achando que Nina era uma "toupeira", mas trabalhando para alguém que não fosse o principal antagonista daquela temporada, essencialmente acompanhando tanto a CTU quanto o pretenso assassinos presidenciais. Eu achava que as pessoas que haviam seqüestrado a família de Jack não estavam associadas a Nina porque eles ordenaram que ele a matasse em algum momento.
Eu vejo de este documento da Fox que Nina estava trabalhando para os principais antagonistas. Explica alguns dos buracos aparentes da trama como agentes diferentes, não sabendo da existência um do outro, e não tendo nenhuma responsabilidade pelo sucesso ou fracasso do outro operário.
- Richard Walsh warns Jack, "Don't trust anybody, not even your own people, Jack."
Early in the series, Richard Walsh gives Jack a keycard and tells him that whoever's electronic signature is on the card is the dirty agent. Nina's signature is on the card.
When Jack confronts Nina about the keycard, she deflects his suspicion by pointing out that she was with him in Santa Barbara (during their affair) the day it was last used at CTU headquarters -- and therefore someone else must have used it that day to set her up.
In fact, she altered the date on the keycard to cover her tracks.
- The dead shooter's thumb (cut off by Jack in an early episode) yields no I.D. CTU speculates the only explanation is that "either this guy doesn't exist or else he has some friends in very high places."
Nina erased the records from the database.
- Nina calls Teri in the car and tells her that the dead body Jack found was Alan York's, thus alerting Teri that the man she is riding with in the car is not Alan York.
Nina was not aware of Gaines or the details of his plan, and thus did not know the significance of the name Alan York, or that telling Teri would tip her off that she was riding with the man assigned to kidnap her.
- Jack shoots Nina, per Gaines.
Nina and Gaines did not know of each other's existence. So, when Gaines ordered Jack to shoot Nina, he didn't know she was on his side.
- Nina helps catch Jamey.
Nina wanted to deflect her own involvement by fingering Jamey.
Nina purposefully brings Kim and Teri to the safe house, essentially setting a trap for them to be recaptured. She then leads Teri to realize that she and Jack were lovers, turning Teri against her and giving her an excuse to leave.
Once Alexis is stabbed and taken into custody, Nina doesn't tell the Drazens.
Telling the Drazens about Alexis does not further her objective, which is to ensure that Palmer is assassinated by the end of the day.
- The Drazens capture Kim as she is being returned to the detention facility.
Nina told the Drazens where to find Kim, to provide them with leverage to force Jack to kill Palmer.
- The Drazens want Jack and his family dead. Why doesn't Nina just kill Kim and Teri when she has the chance?
Nina's objective is Palmer's assassination and not the deaths of Jack's family members.
- Nina helps Jack loyally throughout the season.
Nina knows that she is more powerful with Jack's confidence than without.