Frank Roman

Agent Doggett awakens in a corrupt and violent Mexican town with no memory of his true identity.

The detectives get a break in a case involving a police officer suspected of committing murder.

The squad fears terrorism after a judge and a lawyer receive letters filled with white powder; Internal affairs puts the squeeze on Clark to rat out Andy after the death of a hooker informant.; Jones gets back into the dating pool with another co-worker.

The detectives try to find the son of a deranged man who is killing his family members.

Injured Steve and Jesse help evacuate hospital bombing survivors, while Mark works heroically to save Amanda.