Danny has a busy day coddling an oddball winner, trying to locate a missing high roller, and figuring out a cheater's MO. Big Ed finds his daughter sleeping with Danny.

Danny's friend Greg is found murdered in the desert, reporter is hot on the trail of a naughty senator, and King Arthur is riding through the casino.

Danny and Ed hunt for a sexual predator targeting hotel guests.

Sin City screeches to a halt as a massive power outage brings down the light of the strip, locking down the Montecito, while a mysterious hotel guest is shot on the casino floor. In the midst of the blackout, super sleuths Nessa and Delinda attempt to find the casino killer, while a semi-delirious Sam flirts with paranoia as she suspects the murder to be part of an elaborate cover-up. Elsewhere, a trapped Danny and Mary spend the blackout rehashing some old feelings, while a claustrophobic Mike works tirelessly to free Ed and himself from the lockdown surveillance room.

When a "whale" blows town while owing the Montecito almost $5 million, Ed has 36 hours to find the missing trust-fund baby and force him to make good on the debt. However, when the AWOL gambler turns up at the Montecito's sister resort in New Orleans, Danny, Sam and Ed hop a plane to "The Big Easy" to track their fugitive player. Elsewhere, Mary attempts to control an unruly clan of farmers in town to celebrate their family reunion and recent Powerball jackpot, while Mike takes on the daunting task of coordinating the "World's Largest Wet T-shirt Contest."

Danny is recalled to the marines, effective in 24 hours. While he is getting his affairs in order, Mary has a visit from her father. Danny and Mary confront him together, and when he tells her that he has two little girls, she decides to tell his wife what he did to his first little girl. The casino is also dealing with counterfeit money, and Mike is at the forefront of solving the crime.

There is a going away party for Danny, he asks Ed to be the executor of his will, gives his car keys to Mike and says goodbye to everybody. Finally he leaves and goes to see Mary, they make love and she tells him that she loves him. He then meets Mike and is driven through Las Vegas one last time as he leaves.

Danny returns from the war, much to the surprise and joy of everybody, particularly Mary. However, he is acting strangely as the memories of the war haunt him. He begins to worry everybody, particularly Ed and Mary. The guys of the casino are also contending with two of the dumbest guys on earth, one of who has a microchip in his arm. The new guy Leo has a thing for Delinda, and Sam and Delinda are at odds as Sam wants to hire out Mystique to a group of rich morticians.

Ed, Danny, and Mike combine forces with the investigative team of Dr. Jordan Cavanaugh and Det. Woody Hoyt to solve the murder of a high-stakes gambler. The mystery intensifies when it appears that the gambler's wife may not be the only woman who wants him dead. Meanwhile, Snoop Dogg is trying to convince Delinda to allow the Montecito to be the site of his next music video. Elsewhere, Ed must deal with the demands of his wife Jillian, who has moved into the Montecito while their house is being renovated.

The crossover starts on Crossing Jordan S04E07 What Happens in Vegas Dies in Boston (I).

Ed and Mike piece together the clues of a possible kidnapping. Their efforts lead to a man with a criminal past and also force Mike to recall a terrible memory from his childhood. Meanwhile, Danny and Mary leave Las Vegas for a romantic trip to Los Angeles, amidst rumors that they will return as a married couple. Elsewhere, Delinda becomes enamored with The Polyphonic Spree, a unique musical group, and their leader Tim Delaughter (as himself). Vanessa Marcil and Marsha Thomason also star.

In the final episode of the series' second season, the new owner of the Montecito will be making some big changes to both the staff and property at the casino.

Jon Bon Jovi and Dean Cain guest star in the finale.

In the third season premiere, Ed's got major problems as the revamped Montecito struggles to finish work in time to re-open on new boss' Monica Mancuso's (Lara Flynn Boyle) schedule as he also tries to lure back Danny and his former staff to prevent a suspected "smash-and-grab" heist that has hit other casinos. But convincing Danny and the gang proves to be difficult since each has his or her reasons for leaving, and what's more, Ed suspects two construction hard-hats are planning an inside robbery once the Montecito's doors swing open again amid much fanfare.

The Montecito hosts a comic book convention. Mary is checking into the Montecito for a while. Sam is after the black book of one of the world's greatest casino hosts, who just died. Monica wants Danny to be less like Ed. Danny is worried about the Montecito and calls somebody behind Monica's back.

An urban legend becomes true when Danny finds a guest in an ice filled bathtub missing a kidney. To avoid bad press, the lawyers want to pay him for his silence, but Danny and Mike have other plans and start to investigate a possible scam. Ed helps Sam treat a whale who suffers from really sweaty hands, which is starting to scare the other guests away. Jimmie Johnson comes over to the Montecito to be the final judge of a car convention, in which Delinda for one is participating in.

While Delinda is preparing to get married old romances resurface. Bachelor and Bachelorette Parties are being planned. Meanwhile Ed is being visited by his CIA past.

It's Christmas and everybody in the Montecito is forced to take part in Ed's secret Santa gift exchange. At the same time Danny's car, his most valuable possession, is stolen on Christmas Eve. Delinda is planning her first Christmas with Danny. And Sam gets an autographed photo of Elvis during one of his first concerts as a surprise for one of her favorite "whales."

Mike discovers that Sam has been kidnapped by one of her clients. Danny takes extreme measures to prevent one of his friends from being deployed to Iraq. Delinda discovers some important news for her and Danny; she's pregnant. And Mary decides to take action against her father.

The Montecito staff members along with the Las Vegas police have their hands full as they try to discover who killed Mary's father while investigating the recent hotel robbery.

A mysterious cowboy pays the tax debts of the Montecito and becomes the new owner.

A fugitive is tracked to the Montecito and every bounty hunter and FBI agent in the vicinity wants to make the capture. Danny, Mike, and Cooper get involved but somehow find themselves fighting for their own lives. A favorite "whale" of Sam is in town, but she discovers that his perfect life is in pieces so she offers to lend a hand. With assistance from three hot women, Piper hosts a post-New Year;s pool party that brings cash into the casino. Meanwhile, Delinda feels insecure about her pregnancy weight, but realizes she's not the only one that has packed on the pounds.