Lt. Barker recruits JC and Moreno to get the armored-car robber who killed Eddie and MacNamara.
Agents interfere in an undercover operation aimed at a Colombian drug kingpin.
Missing teens prompt a probe of a private hospital's organ-donor program.
The detectives go undercover on Wall Street to foil a stock-manipulation scheme.
The detectives discover that the CIA is involved in a money-laundering scheme at a bank in a Cuban neighborhood.
Nell's ex husband comes back and ask's Nell for protection from the mob. Nina and J.C. become close.
Lt. Barker gets involved in a bank robery. G cathes Nina and J.C. in bed together.
Nina and Stone go undercover as owners of a garbage company. Nina and J.C. deal with their emotions of sleeping together and G catching them.