An FBI agent trains and handles agents who go under cover to solve crimes; Joe mourns the loss of one of his own as the dangers of the job become all too real.
Darnell and Heather go undercover to infiltrate a band of bank robbers making its way across the U.S.; Lily poses as a waitress to get the goods on a dirty judge in a case that gets personal for Joe.
Artie, Joe's friend, comes back into town, and offers a business proposition. He plan to dig a tunnel from a bookstore to a bank. Lily goes undercover as bookstore owner to distract customers goings on.
Joe and Lola use a dead body to weave a net for a known killer in order to find where he's buried the bodies; Darnell and Lily act as a couple on the rocks in order to create a diversion while the FBI plants a bug in a suspect's car.
Joe does a "black op" for an FBI boss investigating a death of an FBI agent undercover for brutality by the LAPD. Darnell poses as reporter, Lily as medical student and Marcy returns to pose as a funeral director.
Joe and Heather work a sting involving an accused corporate raider who has hired them to take out one co-workers. Lily and Darnell pose as a book dealer and supplier to take down a forger trying to pass off fake manuscripts as real.
Joe must investigate Andy, a fellow FBI handler who's also one of his best friends, after a city councilwoman is murdered and the chief suspect is an informant under Andy's direction.
Joe and his crew pose as filmmakers involved in the adult-movie industry to lure a porn-obsessed man suspected of murdering his wife for insurance money. Also, an acquaintance asks Joe to help find her missing 14-year-old sister.
Elena enters a rehab clinic in order to find out where $5 million in missing DEA money is located; Darnell poses as a hit man to thwart a murder attempt, in a case involving a nationwide drug ring.
Joe enlists the help of his former handler when two of his agents disappear during a dangerous mission. Also, Heather looks after a witness who thinks someone is following her.
Lily goes undercover as an Irish nanny to determine the whereabouts of another Irish nanny who has gone missing and is maybe dead. Joe tries to set Darnell up as a collector/enforcer for a high-powered bookie they want to bring down.
Agents go under cover to investigate the murder of a college intern who was romantically linked to a U.S. congressman. They learn they have the wrong suspect in mind.
Lily is undercover as young Irish mobster's girlfriend. She agrees to marriage to draw his mob boss father into position for arrest. Joe orchestrates wedding as bait, but Lily has to go through with it and marry the guy to get their man.
Joe and team infiltrate dating service to catch woman suspected of killing past dates. Caroline Glenwood is the lethal temptress. Joe, poses as potential suitor, his crew as dating service employees to stop her before she kills again.
