Old Christine takes New Christine out for some pampering while Richard prepares a surprise wedding.

Ned stifles his desire to win at the Ohio Journalism Awards; Nicole uncovers Detrick's monogamy and becomes furious; Oscar comes to terms with the documentary; Mare brings a famous date; Esmeralda sings and Ken plots an emergency to play the hero.

Dan joins a legendary underground Navy poker game during Fleet Week. Abby makes things complicated for Wyatt when she rules against the ruthless PTA president of his kids' school.

A girl from Jake's school invites him to his first boy-girl party. Charlie and Alan help him get ready for it by giving advice which leads to them getting nostalgic remembering their first boy-girl party.

Mike starts construction on the basement.

Harry takes Victoria on a Valentine's Day date.

A worried Mike visits a fertility clinic.

In the midst of her new obsession with couponing, Caroline discovers the secret ingredient to Max's cupcakes.

Max and Caroline are suspicious of the new upstairs neighbour, Sophie, who moves in after the old tenant dies.

Max and Caroline must prove their cleaning skills to upstairs neighbour Sophie in order to be hired as maids for her cleaning business.

Sparks fly when Leonard and Sheldon's mothers finally meet.

Sheldon pushes Leonard and Penny to set a date.

After driving to Vegas to get married, Penny struggles with Leonard’s confession that he kissed another girl. Also, Sheldon doesn't know how to act after Amy pushes pause on their relationship.

Although the Thanksgiving meal is great, Chandler is still moody and Ross is depressed. To cheer them up the group reminisce about their worst Thanksgivings and Monica's worst memory is revealed.

Joey starts to get uneasy protecting Monica and Chandler's secret. Ross becomes enraged at work when someone swipes his turkey sandwich. Rachel attends one of Phoebe's literature classes but doesn't take it seriously.

Rachel has second thoughts about Danny when she observes his uncomfortably close relationship with his sister. Chandler and Ross have a fight over Joey writing his own play and Phoebe gets a job as a donation collector.

As 1999 approaches, the group all make resolutions most of which will require a lot of willpower. Rachel vows to stop gossiping, a resolution put to the test when she learns about Monica and Chandler's relationship.

Mike starts construction on the basement.

Harry takes Victoria on a Valentine's Day date.

A worried Mike visits a fertility clinic.

In the midst of her new obsession with couponing, Caroline discovers the secret ingredient to Max's cupcakes.

Max and Caroline are suspicious of the new upstairs neighbour, Sophie, who moves in after the old tenant dies.

Max and Caroline must prove their cleaning skills to upstairs neighbour Sophie in order to be hired as maids for her cleaning business.

Sparks fly when Leonard and Sheldon's mothers finally meet.

Sheldon pushes Leonard and Penny to set a date.

After driving to Vegas to get married, Penny struggles with Leonard’s confession that he kissed another girl. Also, Sheldon doesn't know how to act after Amy pushes pause on their relationship.

Although the Thanksgiving meal is great, Chandler is still moody and Ross is depressed. To cheer them up the group reminisce about their worst Thanksgivings and Monica's worst memory is revealed.

Joey starts to get uneasy protecting Monica and Chandler's secret. Ross becomes enraged at work when someone swipes his turkey sandwich. Rachel attends one of Phoebe's literature classes but doesn't take it seriously.

Rachel has second thoughts about Danny when she observes his uncomfortably close relationship with his sister. Chandler and Ross have a fight over Joey writing his own play and Phoebe gets a job as a donation collector.

As 1999 approaches, the group all make resolutions most of which will require a lot of willpower. Rachel vows to stop gossiping, a resolution put to the test when she learns about Monica and Chandler's relationship.

Molly enjoys some retail therapy and goes off on a shopping.

Carl & Samuel throw a St. Patrick's party to meet women.

Molly & Victoria set off on a Spring Break road trip.

It's Valentine's Day and Max shows her softer side when Earl has a heart attack and ends up in the hospital after seeing Sophie all dressed up. Meanwhile, Caroline attempts to rekindle an old flame of hers.

Max tries to pass off her cupcakes as kosher when she and Caroline serve them at a boy's Bar Mitzvah.

Max joins Caroline on a trip to visit her father in prison.

Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny's mind at ease. Also, Sheldon films a special episode of 'Fun with Flags' after his breakup with Amy

The guys' science skills are put to the test when they get a flat tire during Leonard's bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family that she eloped with Leonard.

Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard and Penny.

Monica hangs out with Chandler and his co-workers and learns Chandler has a second, more annoying personality when he's around his boss. Ross learns Emily is getting remarried and in grief hooks up with an old nemesis.

When Joey decides to change his image in order to land an acting gig, Rachel offers to help by hooking him up with the latest fashions. Meanwhile, Phoebe's grandmother passes away and she plans for the funeral.

When the friends learn Ugly Naked Guy is moving out of his apartment, Ross leaps at the chance to get his own place. Phoebe finds out about Monica and Chandler's relationship and tries to get them to reveal the truth.

Joey starts dating Katie, a little girl who packs a mean punch. When Ross refuses to contribute to the retirement fund of the building's maintenance man he ends up offending everyone in the building.

Rachel enlists Julia as her 'sex mentor'. Aaron and David break into Samson's house.

After Bruce is attacked at the hospital, Matt helps him deal with the aftermath; Alex motivates Joyce to amp up security, while Ron and Serena debate who is more qualified to defend themselves.

Mia comes back to town with her dance troupe and invites Charlie to her performance. When they meet, Mia explains she wants some of Charlie's sperm to which Charlie responds by asking Mia for something in return.

Charlie and Mia start making their wedding arrangements, however, things begin to fall apart when their two families meet. Eventually they decide on a small ceremony in Las Vegas.

Max offers to help Christine make a major life change after she realizes that her five-year car lease is up and her life hasn't evolved in all that time.

It's Valentine's Day and Max shows her softer side when Earl has a heart attack and ends up in the hospital after seeing Sophie all dressed up. Meanwhile, Caroline attempts to rekindle an old flame of hers.

Max tries to pass off her cupcakes as kosher when she and Caroline serve them at a boy's Bar Mitzvah.

Max joins Caroline on a trip to visit her father in prison.

Monica hangs out with Chandler and his co-workers and learns Chandler has a second, more annoying personality when he's around his boss. Ross learns Emily is getting remarried and in grief hooks up with an old nemesis.