Paul Blackthorne as Stephen Saunders
Chappelle threatens to pull Jack from the investigation for killing a material witness, but Jack persuades him to hold off when they find a fresh lead on Amador's whereabouts.
Amador and Alvers meet with the man who is planning to unleash the virus in LA within the hour.
Michelle and Gael locate the target area, but things really hit the fan when they attempt to capture Alvers in the process of releasing the virus.
Wayne argues with Sherry over the consequences of Milliken's death as the police turn up the heat on Julia.Read More
Saunders begins making demands on the President. He forces Palmer to hold a strange press conference and then orders the death of the CTU agent who can trace him.
Jack learns of a woman who can lead him to Saunders, but a surprise attack shifts the balance of power.
As Gael's symptoms get worse, Michelle devises a way to relieve the suffering of the victims at the hotel.Read More
Jack reluctantly works with Kim on an under-cover job that may help them gain an advantage over Saunders.
Palmer informs his cabinet of the crisis, while Saunders makes yet another demand.
Chase tracks down the man who left the hotel and learns that the virus is spreading to the general public.Read More
Jack attempts to use Saunders' daughter as leverage to gain control of the virus, while Palmer must deal with the discontented press.
Michelle gets the results of her test, while Adam finds that the virus has struck too close to home.
Tony finds himself compromised when Saunders exploits his only weakness.Read More
Jack pushes the envelope in an attempt to force Saunders to disclose the location of the missing vials.
Sherry meets with David to discuss her terms, while Wayne breaks into her home to find the incriminating evidence.
Tony finds himself facing a harsh penalty because of his efforts to save Michelle.Read More
Jack and Chase must make a powerful sacrifice when dealing with the virus.
Tony is able to help Jack one last time before he is taken into custody, while an angry victim seeks vengeance on Saunders.
Palmer makes a surprising career choice in the wake of Sherry's death.Read More