An old nemisis of Nash's breaks out of prison. Joe finds a new house through Ulla, makes an incredible deal on it, but it turns out to be a disaster. Harvey's new partner, Antwon Babcock, joins the SIU.

Nash clashes with his new rival, Deputy Chief Max Pettit, who has assigned Cassidy to a dangerous undercover gig involving synthetic diamond smugglers and a deadly assassin working for the South African diamond cartel. Joe tries to back out of the house purchase; Cassidy and her new partner Rachel McCabe join the S.I.U.

Nash pursues an old flame who is involved with an arms dealer; Joe takes a private detective case to discover if a symphony conductor is having an affair; Cassidy struggles to let go of Evan's memory when she is asked out on a date.

Nash and Joe are on the trail of a high profile robbery ring that targets San Francisco socialites. Nash runs into Angel when Belinda Cruz hires B&D to prove her sister's pregnancy (she's a nun) is not a virgin birth. Joe enlists Nick to build a speed bump in front of is house.

A drug gang knocks over a DEA evidence warehouse and proves elusive for the members of the team; Antwon has a seizure while chasing down the leader of the gang.

Nash and Joe discover that someone is using their detective agency's name to stir up business for themselves, and that one of the impostor's clients is out to kill Nash. Survivor stars from the original season guest star (Dirk Been, Joel Klug, Gervase Peterson, Sean Kennif & Jenny Lewis)

Nash tries to stop a deadly game in which participants shoot and kill each other until only one is left alive; a wealthy family's gardener is murdered and Nash starts to fall for a beautiful new investigator working the case.

Nash must track down Rick Bettina, who escapes custody during his parole hearing, and recover the $2.5 million dollars in pension money he stole. Joe plays a modern-day Cyrano when the love affair between Dov and Amy abruptly ends, jeopardizing his remodel.

A madman guns down five people in an elevator, but leaves a young news reporter alive. Unfortunately, she's as interested in reporting the story as she is in catching the killer. Also: a woman steals Joe's car and commits a robbery using it.

Nash must resurrect Tony B., who fakes his own death to escape a mob boss, only to discover that Tony's ripped the guy off and has good reason to want to be dead.

Nash and Joe help a Canadian Mountie track down a ring of poachers who are illegally selling bear gallbladders, which are supposedly valuable as medicine and as an aphrodisiac; Rachel fears she may be pregnant.

Rachel is accused of murdering a man who was helping the police investigate corruption in an accounting firm, but Nash is convinced she was framed; Joe tries to find a ringer to represent the department in an arm-wrestling contest.

Nash's former lover Tamara Van Zant forges his name on a marriage license and claims to be married to him in order to protect herself from a thug out to kill her; Nick pretends to be romantically involved with a lesbian friend to deflect suspicion from the woman's son, a high-profile gangster from Philadelphia.

Nash and a Federal marshal (Philip Michael Thomas) are taken hostage by a Miami drug lord who wants to exchange them for a witness who's scheduled to testify against him in court; Joe tries to get out of being audited by the IRS.

Nash is suspicious of a teen's involvement in a brutal ambush that targeted a pair of lawyers, leaving one riddled with bullets and the survivor barely wounded. Meanwhile, Joe is burdened by an unwanted roommate, and Cassidy begins seeing Rachel's blind date.

Nash hunts for a vigilante who claims he's helping solve crimes by murdering deadly criminals, including a serial rapist; Nash's distant and eccentric cousin, who is also a cop, visits from Scotland.

Nash goes up against a gang of ruthless techno-geeks who are designing robots to perform robberies. Joe mistakenly sells a painting containing the Declaration of Independence at this yard sale and realizes he must do anything to get it back.

Nash begins to believe that a 17-year-old boy involved in the Southeast Asian drug trade may be his missing brother's son; Cassidy starts dating a plastic surgeon and considers getting breast implants.

Harvey becomes attracted to a fellow ""Deadhead,"" a mysterious woman who is the target of a murderous stalker; Joe is promoted to Lieutenant, but discovers that his new duties mostly involve paperwork; Nick injures his leg and makes life difficult for Nash and Cassidy, who are just trying to take care of him.

Cassidy is suspended following her involvement in the fatal shooting of a bystander during a bank robbery and becomes the target of department cronies who want to use her to get rid of Nash.

A famous mystery writer offers Joe $350,000 for ""Mr. Woody"", while he waits it out (hoping to get more money) meanwhile Harvey stumbles onto a robbery durring a Phil Lesh concert at the Fillmore pulled off by 2 women (Jill Ritchie & Vanessa Dorman)and all Nash and The SIU Team have to go on is that the getaway Harley has a unique design on the side. Finally getting the papers to send Betty Ann on her way, Joe presents them to Nash for his signiture, but before he can sign it and get her outta there, she uncovers that she's found some.....curious irregularites in the SIU files, and it seems that the SIU has a mole. and also Boz (Christian J. Meoli) and Antwon do some P.I. leg work for Nash and Joe to find who stole a demo tape from Dickie Lerner (Rickey Medlocke), a record producer, and it is Rachel's birthday. The last episode i remember seeing out in the west coast.

A serial killer who picks up passengers in a cab and then murders them stalks the city; Cassidy struggles with whether she wants to continue to be a cop.