Still reeling from the murder of one of their own, Steve and Catherine, along with Danny, Junior and some old friends, hunt down the killer; a bag of human bones discovered inside an abandoned storage locker goes missing.
Mac and the team see if the streets of New York are now safe, after the alleged Taxi Cab Killer is found dead.
When a man and a number of sharks wash up on a beach, the team try to find the killer by following a twisted trail of evidence.
On a training exercise at a submarine-building facility, the Sea Dragons run into Cobra impostors intent on stealing sensitive information.
A laboratory hires the agency to protect Ken Miller, a scientist who has invented an aphrodisiac. After testing it in secret, Ken has become irresistible to women.