When a crime wave floods the streets of Reno, the Sheriff's Department is helped by Citizens Patrolman Rick.

Dangle accepts a wedding proposition from his ex-wife's husband, but before he ties the knot, Wiegel gives an even bigger surprise than she planned.

Competition among the deputies for a jet ski inherited by the department turns ugly.

In a short resolution to season three's cliffhangers, it turns out that Garcia and Dangle are pulled out of the car safe (and naked), and, unfortunately, the call placed to the prison was a wrong number, so Craig is killed. Six months later, Wiegel comes back from her "personal leave" pregnant. It turns out that it was not Craig that impregnated her, but rather via a sperm bank that Junior and Dangle may or may not have contributed to. Also, Carrot Top goes insane in a Harrah's hotel, throwing furniture out of the presidential suite, shooting at people and stealing police cars.

"Spanish Mike" Alvarez returns to wreak havoc on the Reno Sheriff's Department.

Hotty's Restaurants become the corporate sponsor for the Reno Sheriff's Department.

The deputies continue investigating the murder of Sheriff Chechekevitch at his funeral.

Jones and Garcia get transferred to mounted patrol, only to discover that not just anyone can dispense justice from horseback.

Garcia goes undercover to bust employers who hire undocumented alien workers, and Junior spends a day with his brothers.

Kimball takes Clementine to her Christian Karaoke singles' mixer.

After Sheriff Chechekevitch is killed in the line of duty, the deputies swear vengeance.

As Raineesha and Trudy consider trying to get raises in the election for deputies, Jones and Garcia tangle with a drug dealer who may be a D.E.A. agent.

Kimball tries arresting a magician performing without a permit, who cano get out of whatever restraint she places on him. Dangle accidentally releases a child killer free. A customer wants to file a complaint against the brothel for fraud. Junior and Jones deal with a drunk at a Renaissance Festival.

Dangle visits his ex-wife and her new husband on their anniversary. Meanwhile, Trudy, Clementine, Raineesha, and Cheresa stake-out a lecherous Meth Dealer and his girlfriends.