The first family, including daughter Olivia (Sprague Grayden), face painful circumstances; Chloe has words with Janis Gold; and Jack and Agent Walker track leads, trying to prevent another terror attack.

Bauer continues to try to root out conspirators inside the government, and Sen.

Blaine Mayer (Kurtwood Smith) becomes his adversary.

Meanwhile, the country faces another terror threat, with villainous Jonas Hodges (Jon Voight) exacerbating the situation and Agent Walker leading the investigation on the ground and in the water.

Renee Walker receives key information once again, Jack gets results from a surprise meeting, and Janis Gold and Larry Moss must deal with Morris O’Brian.

The president’s daughter becomes increasingly involved in the day’ s event s, a high-ranking official delivers devastating news to the administration.

After 22 hellacious hours underscored by the loss of innocent lives, the evil betrayal of Tony Almeida, the First Gentleman’s kidnapping and shooting, a vicious siege on the White House, heroic sacrifices, a conspiracy, exposure to a lethal pathogen and an unthinkable bio-weapon attack, Jack Bauer reaches an emotional breaking point as this remarkable day reaches its climactic conclusion.