text: An assassin named Mandy who had made an attempt on President David Palmer's life in Season Two, becomes the next lead and Bill Buchanan calls Tony into the field to help apprehend her. Tony is captured and Mandy uses him to coerce Michelle into providing her with an escape route, just as Saunders did to Tony in Season Three. Michelle is about to comply, but decides to tell Bill instead. Mandy attempts to fake her own and Tony's death in a car bomb in order to escape. While being walked out of the building at gunpoint by her, Tony attempts to overcome Mandy, but eventually is rescued by Jack and Curtis, who have, by this point, seen through the ploy.
  At the end of Day 4, when Walt Cummings, an overzealous member of the new Logan Administration, decides that Jack Bauer needs to die due to his part in an illegal raid on the Chinese Consulate in Los Angeles, Tony plays an integral part in faking Jack's death. After smuggling him out of CTU, Tony allows himself to have an emotional good-bye to his friend, before he and Michelle drive off to begin their new life.
  24: Day 5
  By Day 5, Tony and Michelle have left CTU and are living life together as civilians. After receiving news that Palmer has been assassinated, Michelle wants to go into CTU and assist in the investigation. Tony tries to dissuade her but she leaves without him and triggers a bomb planted under her car. Tony rushes from the house to see what has happened to his wife, but as he finds her body, the car's fuel tank explodes, critically injuring him. It is later confirmed through CTU conversations that Michelle is dead.