The gang decides to go out to Las Vegas to surprise Joey and to celebrate Monica's and Chandler's one-year anniversary. Things gets rough when a jealous Chandler finds out that Monica had lunch with Richard and everyone discovers that Joey is working in a casino to help finance the movie. Rachel and Ross, who come on a later flight, play practical jokes on each other. (Part 1 of 2)

Ross draws a mustache on Rachel's face, which won't come off. Chandler prepares to go back to New York but Monica stops him. Joey tries to find his hand twin. Rachel refuses to leave her room and Ross desperately tries to make it up to her. Monica and Chandler are on a big roll. Chandler proposes to Monica; her response will be based on a throw of the dice. She rolls a hard eight and says yes. Rachel and Ross get drunk; he paints his face and they leave the room together. Phoebe gets kicked out of the casino but comes back in to annoy the ""hand twin."" Monica and Chandler go to the chapel to get married...only to find out that the drunk Ross and Rachel got there first...

When Barney prepares a comprehensive prenup, the other guys decide to propose relationship amendments to their significant others; Quinn is furious and makes a prenup of her own.

Ted recounts a story about leaving a note for Victoria's ex-fiance (Thomas Lennon) in hope of calming Robin, who is anxious on her and Barney's wedding day.

When one of the roommates decides to move out of the loft, the gang makes an unexpected trip to the desert where Winston faces his fear of the dark, Cece and Schmidt’s relationship reaches a turning point and Jess and Nick square off with a coyote.

The music career of struggling singer Jasmine takes off overnight after she witnesses a tragic incident, but she soon realizes the relentless recognition comes at a steep cost.

Max & Phoebe secretly employ their parents' former sidekick to ease their busy schedule, but the twins' bickering and inability to share provokes an unexpected response from their new sidekick.

Chloe takes June drinking in the financial district, where she finds a hot broker and a job offer; James is paired with the worst dancer on "Dancing With the Stars."

Francine sets out to help Greg when he and Terry split up; Roger becomes obsessed with a fictional boy from an old game.

Katie feels left out when Greg becomes fast friends with the newest member of the Westport Historical Guild; Oliver fears Cooper is ditching him when he sees on social media that Cooper lied about his weekend plans.

Bob appears in a cooking segment on a local news morning program, but Gene steals the show when he crashes the set with a sasquatch mask.

When Bob’s longtime friend, Critter, finds himself in jail for unpaid parking tickets, the Belchers decide to do what they can to help him out. Meanwhile, Linda takes on a babysitting job that becomes more work than she signed up for.

When Bob enters a burger contest, he discovers his distinguishing ingredient is missing; the kids try to help their dad.

Catering an orgy proves to be the wrong place for Ron to deal with his recent breakup; Roman seizes the opportunity to help the host create the ideal orgy atmosphere.

A rat invents pants; a moth tries neon light for the first time; two fish couples endure a tense dinner.

Trent's children learn the true meaning of Christmas when a terrorist dressed as Santa takes over the mall.

Wirt, Greg and Beatrice get all mixed up in the musical antics of a schoolhouse of animals, a lovelorn teacher, a grouchy old benefactor and an escaped gorilla.