Kilmer goes to Cambodia and finds trails of his father who went MIA during the Vietnam War. Kilmer tracks down a friend of his father's and learns that his father is dead.

The ultimate consequences of domestic drug abuse become much clearer when Kilmer and the team discover a Vietnam veteran and DEA Agent who are dealing and using crystal meth from a small, local lab.

When a trio of young renegades sets out for Las Vegas carrying a highly communicable and deadly virus, Kilmer's team risks exposure to the outbreak to stop them from reaching their destination.

When a crazed sniper goes on a killing spree in San Diego, the Threat Matrix team works with the FBI to stop the surprisingly young, troubled shooter.

Atkins is reunited with a Russian agent and an American double agent from his past when the team attempts to prevent poisoned money from reaching wide circulation.

Mo plays the roll of double agent in order to apprehend a small arms dealer who is moving missiles on to U.S. soil. Meanwhile, Atkins' trust is betrayed by a Senator holding court during an election year.

Kilmer and the team try to stop a terrorist and his young daughter before they leave the country and to disarm a potentially deadly bomb before irreparable damage is done.

In order to avert a deadly radioactive blast, the Threat Matrix team has to work with an unsure suspect to identify terrorists who, after plastic surgery, now have new faces.