A nuclear power plant is targeted by terrorists, who impersonate employees and prepare to unleash deadly radioactivity with the help of an unidentified, on-site conspirator.

A U.S. port is targeted by a methodical terrorist, an engineering expert traveling undercover with his 12-year-old daughter, whom he abducted from his estranged wife.

The murder of agent Vargas obsesses Kilmer, heading an intensive manhunt that ties the slaying to an abduction and the secret of a top North-Korean diplomat who's negotiating a major treaty.

Intrigue in Mexico imperils Frankie, a hostage of bank robbers whose link to terrorists is probed in a delicate operation that unites the wary Matrix team with Mexican law enforcers.

A complex mission, spearheaded by Mo, targets a crafty and vicious arms dealer, out to sell deadly accurate, shoulder-held missiles hidden in the U.S.

Currency contaminated by a deadly toxin figures in a terrorist plot involving a ruthless Russian gang and an enigmatic KGB defector who bedeviled Atkins in the early '80s and is now believed to be reactivated.

Deadly sniper shootings take team members to San Diego, where they target an expert 17-year-old marksman with a troubled childhood and a willful father.

Frankie faces murder charges in a thorny case involving national-security and moral issues, tied to the death of a suspected terrorist who succumbed during her intense interrogation. The team rallies to Frankie's defense by seeking to link the deceased to a sinister plot.

A "dirty bomb" threatens D.C. in a suspected airborne attack mounted by terrorists flying out of western Africa, where Frankie and Kilmer seek to unravel the plot with the aid of a shrewd operative who's a former Special Forces maverick.

A bombing suspect is an Egyptian-American, devout Muslim and Mo's old friend, whose detention leads Mo to question issues of individual rights and federal authority.

A strain of the deadly Ebola virus, brought into Texas by an African dog, infects escaped felons, who are sought by the team in a desperate attempt to control the contagion.

The escape of a vain and vengeful chemical-warfare expert from Iraq alerts the team to a potential nerve-gas assault at a major target on American soil.

A crystal-meth lab in rural Utah that's run by a former Delta Force combatant is the key to a terrorist bombing plot targeting the Veterans Day parade route in D.C. Complicating the case: a meth-using DEA agent with an old tie to a Matrix team member.

An elusive "sleeper" agent is tracked in an operation launched from Indonesia, where Kilmer's ex-wife flees from killers who ambush an informer.

Kilmer goes to Cambodia and finds trails of his father who went MIA in 1970 during the Vietnam War. Kilmer tracks down a friend of his father's and learns that his father is dead.

When the team breaks into a chemical plant to stop a hostage situation, it leads to a shooting and the entire Threat Matrix team is put on trial by Homeland Security. Frankie must team up with Homeland Security agent Anders to try to prove that the team did the right thing, while Kilmer becomes uncomfortable about his ex-wife spending more time with her latest interest.