Is set 20 months after Season 5 ended. It begins at 6:00 a.m. Jack is released after being detained in a Chinese prison following the events of Season 5. Terrorists who hold a vendetta against Jack plot to set off suitcase nuclear devices in America and he must secure them. Later, Jack is forced to choose between those he loves and national security when the Chinese set their sights on sensitive circuitry that could trigger a war between the U.S. and Russia.