Nash and company foil a failing restaurateur's kidnap plan to ransom his nanny's child. Nick has sex with Bridget, Caitlin's inept maid. Inger returns for a visit, but leaves for Sweden again. Cassidy has a friend attempt suicide because he can't get a date with her.

The episode was rated 9.05 from 22 votes.

Nash and Joe get a tip from Tony B that there is a hit out on Chief of Police Frank Girard. But it's already too late, as the Chief's car is shot up - the Chief and his driver are killed. Nash and Joe arrive to find the carnage. The Chief was a close friend of Nash's. There was one driver, one triggerman, using a bright red Impala. The Impala crashed into a taxi, leaving behind a paint sample. Thanks to Caitlin's suggestion, the SIU and the Embarcadero station are sharing office space in the barge. There is total chaos, as Joe is forced to share a desk with Jake Cage. Tony B is interrogated. Tony B has a new business - Bay Area Switches. The trucking business is really a front to ship money to Las Vegas to be laundered. Tony B's contact is Ellen Holiday. Holiday is in contact with the assassin of the Chief and with Jimmy Z, head of the money-laundering operation. Holiday is arrested and questioned, but she reveals nothing. The red Impala is found, tracked to a Melvin from a wrecking ya

The episode was rated 9.08 from 26 votes.

Nash and the SIU discover the Cell Phone Killer's intentions are to kill his doctor. Lonely Joe keeps having erotic dreams about Caitlin. Evan gets fired from his bartender job.

The episode was rated 9.17 from 18 votes.

Jake Cage and Caitlin go undercover to capture an international fugitive returning home for the wedding of his daughter. Nash and Joe steal a violin for corporate clients, only to have the violin stolen again by one of Joe's detective students. Evan gets involved with a street prostitute.

The episode was rated 9.28 from 25 votes.

Nash and company foil a jewelry heist ring posing as firemen. Nash hits a pedestrian and gets sued. But Caitlin has misplaced Nash's auto insurance bill, and he blames Caitlin.

The episode was rated 9.33 from 24 votes.

A gang war erupts - Nash and the SIU puts a drug gangster and his crew out of business. Cassidy comes on to Evan as their lovemaking is shown on a live camera web site. Joe and Nick get involved in a tax scam with Nick's racehorse - Mr. Woody, as the horse is once again fit to race.

The episode was rated 9.35 from 23 votes.

An embezzler with a twin, along with bumbling Rick Bettina, confound the efforts of Nash and the SIU to recover stolen city funds. Caitlin tosses Nash's baseball out the window after they miss their flight to Jamaica.

The episode was rated 9.36 from 25 votes.

Nash goes undercover as a hitman for a drug cartel. Nick's poker buddies plan a bank heist; Inger returns from Sweden with her mother; Evan gets his engagement ring back from Cassidy.

The episode was rated 9.38 from 24 votes.

Wearing his brother's uniform as a motorcycle cop and impersonating a police officer, a deranged man imagines and talks to his dead brother. Nash adjusts to his break-up with Caitlin; Nick fails his driving test; Cassidy asks Evan for help to move back into a Berkeley apartment.

The episode was rated 9.42 from 24 votes.

Lowlife Frankie Dwyer returns, this time importing Vietnamese women as sex slaves, as Caitlin goes undercover as the seller. Nash has a tooth ache and refers to Caitlin by his first wife's name. Joe is aggressively pursued by bodybuilder Spike; Evan bumps into Cassidy in his job as a parking lot attendant.

The episode was rated 9.42 from 24 votes.

A married woman is murdered by her lover and his wife. Evan is beaten up trying to free his girlfriend/hooker from the clutches of a pimp. Joe takes Evan in, but Evan attempts suicide. Boz Bishop asks for a promotion at the detective agency.

The episode was rated 9.52 from 23 votes.

A juror becomes a vigilante avenging murder victims. Caitlin and Joe go in on a donut business venture. Evan is arrested and calls Cassidy; Cassidy finds a new boyfriend.

The episode was rated 9.52 from 21 votes.

Cassidy finds an apartment, only to be mistaken for the previous renter who has stolen money from drug dealers. Lonely Joe carries on an online romance, but the other ""woman"" turns out to be Pepe. Evan bottoms out in his broken relationship with Cassidy

The episode was rated 9.54 from 24 votes.

Frankie Dwyer returns again, putting out a contract on Nash's life while smuggling heroin inside of tofu containers. Nash and Caitlin's relationship is strained; Inger sets up Nick with her mother Ulla; Evan is born again in a baptism.

The episode was rated 9.55 from 20 votes.

Evan puts himself under suspicion after he takes $40,000 of drug money during a bust; Nash and the SIU take down a drug dealer. Nash and Joe guard a chimpanzee, while Jake Cage goes undercover as an animal extremist.

The episode was rated 9.64 from 22 votes.