Ralph investigates when a craps dealer is murdered in a home invasion; and Savino tries to gain the trust of a new count-room manager who is connected to Chicago mobsters.

Mia's father, a hot-headed Chicago mob boss with a gambling problem, causes trouble for Savino when he visits the Savoy.

When Savino tries to invest in the same casino that the local Milwaukee crew has been eyeballing, Milwaukee comes after him. Meanwhile, when Sheriff Lamb investigates the murder of an African American maid, he's surprised to uncover her connection to one of the town's most wealthy businessmen.

Sheriff Lamb suspects Savino of kidnapping the son of a member of the Nevada Gaming Commission in order to fast-track a gaming license for The Tumbleweed. Meanwhile, when Savino's wife, Laura, comes out to Vegas to support him in a new venture, his promise that their family will be safe there is put in jeopardy when a ruthless hitman from Milwaukee arrives in town.

Savino decides it’s time to put a new, mob-friendly mayor in office, and with his wife Laura’s help, grooms George Grady for the campaign. Meanwhile, Sheriff Lamb investigates the murder of a dentist who appears to have been killed because of his gambling addiction.

Sheriff Lamb finds himself in the unusual position of protecting Savino when Milwaukee puts out a hit on the mobster. Also, the results of the mayoral election are in.

Rizzo complicates life for Savino when he hires a popular singer at the Savoy who is also Savino’s ex-mistress, Diane Desmond. Meanwhile, Ralph, Jack and Dixon share jurisdiction with the military on a murder case when clues lead them to a nearby Air Force base.

When a young Vegas showgirl is attacked and murdered, the Lambs work to track down the killer, realizing early on that there’s something about the case that resonates personally with Katherine. Meanwhile, Savino manages to land a high roller at the Savoy and tries to use him to show other “whales” that the Savoy is a real contender for high stakes gambling.

Sheriff Lamb assigns Dixon an undercover job at the Savoy when Savino suffers a series of robberies, while Ralph and Jack look at the mob when they investigate the murder of the biggest contractor in Las Vegas.

Sheriff Lamb is kidnapped by a suspect bent on revenge, and is forced to dig his own grave. Meanwhile, Savino and Rizzo are roughed up by a rival mob and must come up with a deal quickly to try to save their lives, and Katherine and Laura embark on a new partnership.

Sheriff Lamb’s former flame reappears and seeks his help finding the man who attacked her husband. Meanwhile, Savino has a unique way of dealing with a snitch inside the casino.

Jack is in dire trouble when he’s blindsided by Mia’s father, Rizzo, who wants to grill him about his daughter. Meanwhile, Dixon saves a drowning girl and discovers she was poisoned, and Savino and his Savoy crew find themselves stranded in the desert overnight.

Jack is faced with breaking some dire news to Mia, while at the same time he's compelled to hide vital information from her and his brother.

Sheriff Lamb investigates when a dead man is found in his car by the side of a desert road, while Dixon is assigned to watch over a rowdy Hollywood starlet in town for a movie shoot.