An unlikely duo joins forces to forestall an impending attack. The terrorist reveals her demands. The President orders a military lockdown, but it may be too late.

As the smoke clears after the devastating events of the first five hours, tensions between President Heller and Prime Minister Davies boil over, and one of them decides to take matters into his own hands. In the meantime, Jack proposes a plan to locate Margot by using someone unexpected as his unsuspecting bait. Back at the CIA in London, Jordan raises suspicions about Kate's husband.

Jack and Chloe have a plan in place to eliminate the terrorist threat before any more attacks rock London. With no time to spare and lives on the line, Jack and Kate pursue crucial leads in an attempt to gain the upper hand on the incredibly intense circumstances. Meanwhile, key players reveal their true colors. intense circumstances. Meanwhile, key players reveal their true colors.