Four more "suitcase nukes" are out there, and Jack's only lead takes him to the home of his brother.

The President meets with a known terrorist, while Jack searches for Morris, Fayed seeks a trigger, and Tom Lennox makes a choice.

While Jack looks for Gredenko and tries to save Josh, White House intrigue deepens.

Jack's search takes him to the home of an old enemy, while a bomber slips into the White House.