When a suicidal hotel guest (guest star Jon Lovitz) declares his life-ending intentions, Danny and Ed race to stop him from taking a flying leap off of the Montecito. Pleading to save the guest's life with the help of a little Vegas magic, Danny and Ed introduce him to the joys of gambling, but their plans backfire when he hits a major winning streak. Meanwhile, Sam lets herself get a little too close to a client only to have her romantic dreams ruined when his fiancée (guest star Paris Hilton) comes to town and Ed struggles with an over-eager security guard.

The Pacific Tropic Spokesmodel contest at the Montecito is sabotaged and Mike leads the investigation.

The holidays are getting closer at the Montecito and everyone is working on their holiday plans except for Mike, who seems to have doubts about his place in Las Vegas.

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."

Cooper sends Mike and Danny to Wyoming to buy a horse for his ranch.

The casino hosts a boxing match. Delinda, Nessa and Mike find a bag of cash. Blue Man Group has a cameo.

When a less then brilliant townie (guest star Sean Astin) hits a big cash jackpot at the Montecito, Danny draws the challenging task of securing the winner and his bag full of cash only to watch Vegas' newest millionaire die for an alleged heart attack. However, when the man's greedy wife turns up to claim his winnings and discovers both the body and the cash are MIA, Danny smells a scam and scours the city for the missing money. Elsewhere, Ed welcomes a special guest - his mother Bette (guest star June Lockhart) - who regales the staff with tails of the fierce president of operations childhood, while Sam attempts to control the king and queen of coupons who are determined to leave Vegas without spending a dime.

This is another cross-over episode with Crossing Jordan. Woody and Jordan are in Las Vegas to investigate the murder of a violinist and the disappearance of his Stradivarius. The Montecito's safe-deposit vault is being robbed.

Delinda wants Danny and the casino staff to be more environmentally friendly.

Ed's ex-CIA partner heads security for a diva. A full-comp VIP gives no gaming action. Penn & Teller have a cameo.

A high roller's rowdy daughters become Danny's responsibility. A small-town fiancé is seduced by the tables as Mary organizes a group wedding. Mike is sued by a drunk woman he rescues.

A magician's wife disappears as scheduled, but fails to return. Mike's college buddy is in town. A convention of swizzle-stick collectors requires extra security.

Sam is trying to track down some of her recent clients who stiffed the Montecito. An old associate of Ed's helps her. Mary tries to conquer one of her biggest fears. Danny and Delinda talk about moving in together.

A rare bottle of wine is found in the wine cellar of the Montecito, so Ed decides to sell it in an auction to improve the Montecito image. However, Mike discovers that the wine isn't original just after it is sold for one million dollars. Also, a group of retirees goes to the Montecito for a sudoku tournament and starts giving Sam a hard time when they have a different idea of fun. Danny gets jealous when Delinda starts spending a lot of time with a new toy.

Nicole one of Ed's former employees comes to the Montecito for her first wedding anniversary with her husband Ollie. Ed becomes suspicious of him and makes Mike and Danny watch him. Also Mary and Sam start fighting as they can't decide which guests are more important to get "OK GO'S" tickets.

The new owner of the Montecito, A.J. Cooper, introduces himself to the staff an brings a new campaign with him: "Anything Can Happen." The staff get worried that people might get fired. Sam is seeing a psychiatrist because of her recent abduction, but she won't open up to him. Instead, she tells him everything about her colleagues.

Sam continues therapy with her psychiatrist, which includes working on her social skills. Cooper wants to fill the vacant position of President of Operations, so Mike and Danny both apply for it.

Two of Cooper's billionaire friends come to the Montecito for a visit and a poker game. Cooper decides to shadow Sam to better understand her work only to scare off one of her clients. Piper tries to scare everyone with her variety of Halloween costumes.

Danny and Mike see a strip-club owner get physical with a stripper; Delinda advocates for better rights for exotic dancers in the city; Piper enlists Sam's help to find a racy video that she does not want people to see.

Piper runs into trouble with the gaming commission, but Cooper bails her out, raising suspicions of the staff.

When thieves want to steal a rare stamp from a Montecito auction, they take the whole surveillance team hostage.

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.

An escaped murderer seeks revenge against Sam for testifying against him; the hotel hosts a statewide cheerleading competition; Nessa discusses the merits of Manchester United with a trio of rowdy British soccer fans.

When five million dollars of diamonds is stolen from a Montecito guest, Danny enlists Mike's technical expertise to determine the techniques used by the mysterious thief. However, Mike's involvement sends him off on a detective tangent as he is determined to solve the great jewel caper. Meanwhile, the arrival of one of the hotel's most loyal high rollers and his announcement of his pending marriage shocks Sam, especially since his fiancé utters the tragic phrase that he "will never gamble again". Determined, she works with Delinda and Mary to make this gambler realize that the true love he seeks actually exists with his longtime assistant. Elsewhere, a corporate psychologist visits the staff to get a read on the mental health of Ed's team.

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).