Jonas and some of the Unit are at a big bank in Atlanta where someone has left a bomb that is supposed to go off sometime within the next 24 hours. None of the 650 employees are supposed to leave the building, either, according to one of the threatening letters, so the bomber is probably somewhere watching. To make matters worse - really worse - this is a nuclear bomb - so Jonas has to tell the governor (under some other pretense) to have the city of Atlanta evacuated immediately.
In the second story, Bob and Kim are in Cancun, Mexico, on vacation. At least that's cover, except Kim thinks it is a real vacation and is more than not happy when she finds out her husband is really there on a mission. However, she helps him out as he tries to stop two Chinese spies, a husband-and-wife team. from smuggling back technology information back to China.
This was an excellent episode. Both stories had good suspense and dialog.