Joe and his agents infiltrate a dating service to catch a woman (Annabella Sciorra) suspected of murdering wealthy suitors.
Lily's mission to infiltrate a crime family goes awry when the boss' son falls in love with her and proposes marriage.
Joe sends his agents under cover as a veterinarian, a groomer and a horse owner to bust a trainer suspected of killing horses.
Agents go under cover to investigate the murder of a college intern who was romantically linked to a U.S. congressman.
Lily works under cover as a nanny in a widower's household to probe the mysterious disappearance of her predecessor.
Joe enlists the help of his former handler (Rita Moreno) when two of his agents disappear during a dangerous mission.
Agents try to recover millions of dollars stolen during a DEA mission gone bad; Elena checks into a drug rehabilitation center to befriend an addict (Laura San Giacomo).
Joe and his team infiltrate a gang of thieves who plan to rob multiple jewelry exchanges across the United States.
Joe and his agents pose as pornographers to ensnare a bar owner suspected of killing his pregnant wife for her multimillion dollar insurance policy.
Joe must investigate a fellow handler (Lou Diamond Phillips) who is linked to the death of a politician.
Posing as an assassin, Joe gains the trust of a corporate raider who wants to take a hit out on a former colleague.
Joe suspects the police are involved in the murder of one of his agents assigned to an undercover task force.
Heather goes under cover as a prostitute to stop a murderous pimp (Peter Weller); Darnell and Lily pose as a bickering couple in order to stall a bar owner while the FBI installs a bug in his car.
Joe must slip into one of his old undercover roles when he accidentally runs into a fugitive he used to work with.
Darnell poses as a carjacker and infiltrates a drug-abusing gang of bank robbers; Lily goes under cover as a bartender in a case involving a corrupt federal judge.
FBI agent Joe Renato trains crime-fighting operatives to infiltrate all levels of society; Joe mourns the loss of one of his own as the dangers of the job become all too real.