Harvey's shot by death metal rockers; Stacy and Nash meet Nick's long lost love; Joe finds Evan and Cassidy in a compromising situation; Nick gets an overdue Navy Cross.

Nash and Joe investigate the disappearance of several armored bank trucks and its drivers while Nash gets caught up in one of Joe's off duty work cases to find a beautiful woman who was in the stands at a professional football game.

Nash must protect Lynette from ruthless Hong Kong mobsters when she unknowingly becomes involved in an Asian forgery ring. Meanwhile, Joe's visiting father, a sheriff from New Mexico, drives Joe crazy with his meddling until he uses his own brand of Wild West sleuthing to expose a murderer in Joe's apartment building.

Nash and his SIU team search for the source of deadly VX nerve gas before there are catastrophic consequences. Meanwhile, things heat up between Cassidy and Evan, and a young woman believes that Joe might be her father.

Nash helps Richard Bettina clear his name after he has been framed for the murder of a prostitute. Joe Dominguez tracks down the man who stole his identity and ran up a credit card bill in his name.

A deadly carjacking leads Nash and the SIU team to a drug dealer who owns a Hemi Cuda similar to Nash's. Meanwhile, Evan and Richard Bettina enter a transgender beauty contest to catch a killer.

Nash runs into his ex-wife Kelly and soon discovers that the man she is now romantically involved with is somehow linked to a dangerous IRA terrorist. Meanwhile, Joe looks after a party-minded Arabian prince awaiting a heart transplant.

Nash and Joe team up with a tough talking NYPD Special Crimes Detective in order to track down a famous fashion model's deadly stalker. Meanwhile, Harvey helps Evan track down his lost badge before Nash finds out. A shopping trip doesn't turn out the way Nick and Lynette had planned.

Bettina forces Nash off the job by ordering him to take his numerous unused vacation days.

Joe Dominguez and the rest of the SIU cover for Nash after he has his drink spiked with LSD. Geraldo Rivera wants to interview Joe and Nash for his television show, but is given the run around until Nash can recover.

A million dollar bounty on Nash's head triggers an onslaught of attacks by a series of ultimate fighters. Michelle meets "Mr. Right" while on a stakeout trying to track down an Internet rapist. Nash is convinced Cassidy's new boyfriend is gay.

A prisoner being delivered for execution is kidnapped in a plot that may involve the British consulate. Joe tries to get his daughter into a prestigious daycare business.

Rick Bettina returns as the head of the S.I.U. when Joe is accused of stealing 3 million dollars from a suspect. Harvey has a torrid affair with a woman he once arrested.

A shady woman who shares a past with Nash is the key to finding stolen weapon-grade plutonium; Joe wants to market his salsa.

A convict inadvertently released by county officers targets Michelle; a TV reporter is being blackmailed.

A clash between rival drug lords uncovers new evidence on the whereabouts of Nash's missing brother, presumed killed in the Vietnam War. With Joe on vacation, Nash must rely on the rest of the team for help. While Lisa is away, her sister stays to watch Cassidy, causing some disagreements with Nash.

A wave of blue flu by the uniform cops on Halloween is no treat for the SIU, especially with a sniper on the loose. Michelle faces a possible early end to her career. Joe tracks down a hard to find Halloween costume for Lucia.

A thief uses extreme measures to heist an heirloom necklace from a wealthy businessman's penthouse. Stacy becomes concerned that Nick is being turned into a lab rat at the university where he has volunteered for a research study.

An explosion leaves Nash with short term memory loss, which forces him to piece back together the details of his undercover operation.

A psychotic killer gets his inspiration from the villains of the Sherlock Holmes stories; Joe hires a take charge nurse to help with his colicky daughter.

A former mob hit man drops out of witness protection to pursue a personal vendetta; Nick dates a shady younger woman; Inger has to go out of town, leaving Nash and Joe with the baby.

A convict gets a furlough from prison to help Nash and Joe catch his former partner in crime. Lisa's new business partner isn't what he seems.

Nash and Joe become involved with a headstrong undercover cop when they pursue thieves who've ripped off weapons from the FBI. Joe sets Nash up on a blind date with his nanny.