Moira attempts to beautify the town. David misuses the company credit card, and Alexis and Mutt question their relationship after a personal grooming misstep.

Steph tells us about her journey losing weight, what kind of people annoy her and how much she eats in Ramadan. Brwon talks about his Ethiopian heritage and his strange experiences in the workplace.

The Canadian drugs have taken their toll on Pete who manages to offend his entire family on a solemn occasion. His only choice is to go to rehab, but first must meet with several people in his life to tell them that he's going away.

Charlie finds out that Alan and Judith have begun to date again.

Berta causes tension between Charlie and Alan when she temporarily moves in with them.

Chelsea is put off by Charlie's jealousy towards her relationship with Brad and he vows to become the better man he says she deserves.

Crushed over his break-up with Chelsea, Charlie goes missing and comes back to Malibu married.

Charlie and Chelsea's break-up doesn't stop them from having a post-breakup one-night stand.

Frankie & Mike celebrate their 20th Anniversary.

Frankie & Mike spend the three day weekend with their kids.

Axl and Sue are enrolled in the same Life Skills class.

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas. Sheldon becomes locked out of his apartment so must stay with Penny.

Penny's second date with Stuart sees her making a comment that gives Leonard new hope for a relationship with her. Wolowitz realizes there's a crucial error in a NASA project he's working on.

The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.

Rachel and Ross' prank war starts getting out of control. Meanwhile, Chandler makes the bet of a lifetime to fix his relationship with Monica.

A hung-over Ross and Rachel are shocked to discover they are husband and wife. Monica and Chandler search the Strip for signs that they are altar-bound whilst Joey and Phoebe have a cross-country adventure.

Monica and Chandler decide to move in together, leading Rachel to believe that all three of them will be roommates. Phoebe discovers that Ross hasn't annulled his marriage to Rachel.

Monica and Chandler disagree over how to redecorate Rachel's old room. Joey advertises for a specific type of roommate. Ross is unwilling to accept that he is still in love with Rachel.

Chelsea is put off by Charlie's jealousy towards her relationship with Brad and he vows to become the better man he says she deserves.

Crushed over his break-up with Chelsea, Charlie goes missing and comes back to Malibu married.

Charlie and Chelsea's break-up doesn't stop them from having a post-breakup one-night stand.

Frankie & Mike celebrate their 20th Anniversary.

Frankie & Mike spend the three day weekend with their kids.

Axl and Sue are enrolled in the same Life Skills class.

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas. Sheldon becomes locked out of his apartment so must stay with Penny.

Penny's second date with Stuart sees her making a comment that gives Leonard new hope for a relationship with her. Wolowitz realizes there's a crucial error in a NASA project he's working on.

The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.

Rachel and Ross' prank war starts getting out of control. Meanwhile, Chandler makes the bet of a lifetime to fix his relationship with Monica.

A hung-over Ross and Rachel are shocked to discover they are husband and wife. Monica and Chandler search the Strip for signs that they are altar-bound whilst Joey and Phoebe have a cross-country adventure.

Monica and Chandler decide to move in together, leading Rachel to believe that all three of them will be roommates. Phoebe discovers that Ross hasn't annulled his marriage to Rachel.

Monica and Chandler disagree over how to redecorate Rachel's old room. Joey advertises for a specific type of roommate. Ross is unwilling to accept that he is still in love with Rachel.

Charlie runs into Chelsea's old friend Gail. Alan learns he's able to please a new female chiropractic patient just by working on her lower back.

Alan plans an intimate night at a hotel with Lyndsay, but her "time of the month" gets in the way.

Frankie finds a new friend for Mike.

Sue sets out to prove that smiling is contagious.

Axl and his friends make a profit on broken hearts.

Axl and his friends make a profit on broken hearts.

When Sheldon learns that the guys tampered with his expedition data he got from the arctic, he leaves to Texas in disgrace. This results in the guys following him, which threatens Leonard's hope for some romantic time with Penny and the guys' friendship with Sheldon.

Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket.

Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.

Ross is asked to give a series of lectures at NYU. Phoebe learns from her psychic that she only has a week to live. Learning his health insurance has lapsed, a hernia-bearing Joey tries to pick up a quick acting gig.

Joey finds the keys to a Porsche in Central Perk and while trying to find the owner winds up pretending he owns the car. Meanwhile, Chandler, Monica and Phoebe babysit Alice and Frank's triplets.

Chandler and Monica are moving in with each other, which means Rachel is moving in with Phoebe and Joey will be without a roommate. Ross doesn't want to help with the packing so he stays at home with Ben, or so they think.

Rachel regrets asking Phoebe to jog with her when her uncoordinated movements attract unwanted attention. Chandler decides to surprise Monica by cleaning the apartment but forgets where everything goes.

Wendy closes in on Séamus and his family whilst navigating a casting crisis at work.

Charlie learns he can't be in a long-lasting relationship because of unresolved issues he has with his mother. Jake asks Charlie for advice about a girl at school.

Ignoring Alan's warnings, Charlie continues to date Isabella until she threatens to put a curse on his manhood.

Johnny contemplates running for Town Council. David and Stevie look for love in all the wrong places while Alexis comes to terms with single life.