When a man is kidnapped by a someone he sent to prison. His wife calls Sheppard to help. When the kidnappers call, Sheppard pretends to be the man's accountant and begs for time to raise the ransom. So Sheppard turns to Trout for help. But it seems obvious that the kidnapper is not going to let him go.
When some terrorists threaten to release a biological weapon unless their demands are met. And to prove that their serious they released it on a small area. So the team is sent to stop them. They begin by raiding their HQ in Mexico where they learn that they're planning to attack somewhere in L.A. And once they learn that they try to stop them.