In the midst of investigating a serious bomb threat, Don and Charlie uncover a secret that could change their lives and the lives of the team forever.

$50 million dollars in medical relief is up for grabs after the shipment is stolen. But there's a catch--someone other than the FBI wants to recover the shipment. Don and the team find themselves pitted against blackmarketeers in a deadly race for the supplies.

Don, Charlie, and the team take on unknown terrorists who may be using nerve gas to undermine Los Angeles' water supply.

When a former mob hit man on death row suddenly has a change of heart and agrees to confess to his crimes, Don has an uneasy feeling about the whole affair.

When Don investigates a series of bombings, he calls in Charlie to help pinpoint the bomber. But the two disagree over who the culprit is. Is it a new terrorist, or an old enemy?

When a jet crashes in the middle of a forest, Charlie suspects that there is more to the crash than what meets the eye.

Several area murders seem to be tied to voter fraud. Don, Charlie, and the team must find the killers before they strike again.

Don talks to his therapist again, and while he's gone, the team races to find an eleven year-old boy being held on a $3 million ransom, and time is running out...

One of David's boyhood friends is called into question after a man dies while he's sparring with him. When it turns out this is not the first time such an event has happened, things look even worse. Charlie is busy practicing what little he knows about poker, so he can ...

Don and the team reopen a cold case when a LAPD badge turns up at a construction site. When Charlie joins the investigation, they attempt to track down the owner of the badge, an officer who has been missing 17 years. Meanwhile, Alan is informed that he's being sued.