What was the name of the traitor in season 1 of 24?

In Season 1 of "24," the traitor is revealed to be Nina Myers, who is a mole within the Los Angeles Counter Terrorist Unit (CTU). Throughout the season, she appears to be a trusted ally of Jack Bauer, but ultimately betrays him and the team by collaborating with the antagonist. Her actions have significant consequences for the characters and the unfolding plot.