The Unit finds itself torn between saving an African dictator or innocent people when they are sent into a hospital as a hurricane hits.On the home front, Mack and Tiffy reconnect with each other.

When a Thai prince visits the U.S., Mack, Grey and Williams are up for bodyguard duty. In the mean time, Jonas and Bob jump out of a plane to catch a terrorist. The priorities change dramatically when Bob's parachute malfunctions

Mack, Charles and Jonas are assigned to protect an American musician while she tours the army camps in Iraq, while Bob is assigned to transfer a prisoner from a high-security prison.

Jonas goes on a solo mission, enlisting the help of some local militants to hunt down a terrorist known as "The Butcher". Charles is still recovering in the hospital, Mack takes on the task of arranging Hector's final funeral preparations, with the help of the other wives and Bob has been ordered to deal with the rescued journalist. Ryan must deal with the man sent by Washington to oversee the cover story.

Unable to communicate with the outside world, the Unit and their families must survive when a deadly gas poisons anyone in their community who steps outside.