Bonnie's birthday gift for Adam gets a so-so response.

Bonnie relives painful Christmas memories.

Axl and his friends make a profit on broken hearts.

Axl and his friends make a profit on broken hearts.

Frankie frets about Brick's field trip to Chicago.

Frankie and Mike bring out the "wheel of pain."

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

Penny's criticism of Wolowitz's romantic life pushes him into depression and he goes AWOL for a fighting robot battle the rest of guys are depending on him for.

Sheldon creates a scientific procedure for making friends.

Monica and Chandler return from their honeymoon with stories of a couple they met on the flight back. Ross and Rachel disagree over who came onto whom when they hooked up and Ross reveals he has the encounter on videotape.

Phoebe dates a guy who works for Monica which causes a problem when Phoebe wants to dump him on the same day Monica plans to fire him. Joey sets Rachel up on a date, leaving Ross to worry about their future.

Monica and Chandler decide to throw a costumed Halloween party. Phoebe runs into Ursula, who's getting married the following week, and invites Ursula and her fiancé to the party.

Chandler hires a maid, whom Monica suspects is stealing her clothing. Ross tries to get Rachel an apartment in his building but the woman living there isn't in a hurry to die; plus Joey wants Rachel to stay with him.

Bonnie's therapist helps her communicate with Adam.

Bonnie's birthday gift for Adam gets a so-so response.

Bonnie relives painful Christmas memories.

Axl and his friends make a profit on broken hearts.

Axl and his friends make a profit on broken hearts.

Frankie frets about Brick's field trip to Chicago.

Frankie and Mike bring out the "wheel of pain."

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

Penny's criticism of Wolowitz's romantic life pushes him into depression and he goes AWOL for a fighting robot battle the rest of guys are depending on him for.

Sheldon creates a scientific procedure for making friends.

Monica and Chandler return from their honeymoon with stories of a couple they met on the flight back. Ross and Rachel disagree over who came onto whom when they hooked up and Ross reveals he has the encounter on videotape.

Phoebe dates a guy who works for Monica which causes a problem when Phoebe wants to dump him on the same day Monica plans to fire him. Joey sets Rachel up on a date, leaving Ross to worry about their future.

Monica and Chandler decide to throw a costumed Halloween party. Phoebe runs into Ursula, who's getting married the following week, and invites Ursula and her fiancé to the party.

Chandler hires a maid, whom Monica suspects is stealing her clothing. Ross tries to get Rachel an apartment in his building but the woman living there isn't in a hurry to die; plus Joey wants Rachel to stay with him.

Tammy's long-lost aunt appears.

Marjorie attempts to reconnect with her estranged son.

Christy's upset when sparks fly between Tammy and Chef Rudy.

Frankie's sister comes to help out.

Frankie's deeply disappointed in The Bachelor finale.

Axl's band gets their first paying gig.

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.

A paintball game leads to a fight between Sheldon and Penny and romance for Leslie and Wolowitz.

Rachel prepares to have dinner with her dad to announce her pregnancy. Chandler discovers Monica had a stripper at her bachelorette party, resulting in Monica trying to make it up to Chandler by getting him a stripper.

Monica invites an old friend from high school for Thanksgiving dinner, unaware that he started a "We Hate Rachel" club with Ross. Meanwhile, Chandler and Phoebe pretend to watch football to avoid helping in the kitchen.

Chandler is peeved when Monica splurges on an expensive pair of boots. Phoebe learns Ross' and Sting's children attend the same school and angles to meet the celebrity and get concert tickets.

Ross panics when Mona gets an idea to send out a holiday card from the two of them. Chandler's newly divorced boss tries to get Monica and Chandler to come out to dinner with him and Rachel's hormones start acting up.

When Jim embellishes his yoga abilities to impress a woman, Julia must step in to save him from looking like a fool.