In the finale of season one, Bauer, who headed up the Los Angeles branch of the Counter Terrorist Unit (CTU), thwarted an assassination attempt on the life of Senator David Palmer. However, in the process, Jack's wife Teri was murdered by turncoat agent Nina Myers.
In the season two premiere episode "8:00-9:00 AM", Jack and his daughter Kim continue to deal with the trauma of Teri's loss, and the effect it has had on their relationship. But with one phone call, Jack, who has been inactive since Teri's death more than a year ago, is called upon by David Palmer — now President Palmer — to stop another terrorist plot with global implications. The clock begins ticking again...