Berta's granddaughter spends the day at Charlie's, which isn't a problem until he learns she's a beautiful, rebellious 16-year-old.

When Judith decides to take a vacation, the brothers have to take care of Jake during the week. Alan finds it challenging, and even forgets to pick up Jake from soccer practice. When Alan finds out that he has to go to the I.R.S. because they're auditing him, he forces Charlie to take care of Jake, and Charlie doesn't do any better then Alan.

Charlie is stunned to learn his ex-girlfriend is now a man.

Evelyn demands Jake spend a night at her place when she finds out he spent Spring Break with Judith's parents. Neither Alan nor Charlie are keen on the idea, but going to a bar after dropping off Jake quickly erases their concerns.

After Chelsea discovers a nude picture of another woman on Charlie's cell phone, he blows off steam by going out for a night of drinking with Alan, Herb and his neighbor.

Alan finds an opportunity to make money; Walden addresses his co-dependency issues.

Alan has trouble deciding if he should bring his younger girlfriend to Jake's birthday party to meet his mom and his ex-wife. Rose tries to get her boyfriend to act more like Charlie.

When Jake repeats one of Charlie's sexist remarks in front of Judith's support group, the women convince Judith to stop Jake's visits with his dad and Charlie.

Charlie unknowingly sleeps with an older man's trophy wife while Jake has to read a paper to his class.

Charlie and Mia start making their wedding arrangements. Things begin to fall apart when their two families meet each other. They eventually decide on a small ceremony in Las Vegas.

Charlie starts to question his relationship with Chelsea when he hears that Mia is back in town. Meanwhile, Judith goes into labor and Charlie, Alan and Herb rush her to the hospital, on the sixth season finale.

Judith is upset with Alan and Charlie when she learns that a surfer who uses Charlie's shower walks around half naked in front of Jake . Then Alan's worried when Judith and the surfer become friends.

Judith's devious siren sister stirs things up at Jake's 11th birthday party when she hits on Alan. Meanwhile, Evelyn brings alcohol and has a party of her own.

Charlie takes a liking to Myra, the witty sister of Judith's fiancé, Herb.

Walden and Alan are caught in the crossfire when Jake cheats on his girlfriend (Jaime Pressly) with her 18-year-old daughter.

After reconnecting with Kate, Walden becomes convinced she is the one for him -- until he meets a woman named Vivian (Mila Kunis).

Carefree jingle writer Charlie Harper has his lifestyle altered when his uptight brother and his 10-year-old nephew move in with him.

After Charlie takes Alan to an eye doctor, they end up at cafe where they bump into Charlie's ex-girlfriend, Sherri. While there Alan shows an interest in Sherri, and decides to ask her out. The problem is that Alan can't get over Sherri's relationship with Charlie.

Alan tries to win Kandi back. Meanwhile, Charlie starts to sleep with her mom, Mandi, and Judith gets set up with her father, Andy.

Alan meets a woman named Nancy at a grocery store, who fulfills every single one of his desires, forcing Charlie to take care of Jake. After knowing Nancy for a few days Alan decides to ask her to marry him, prompting Charlie to try and talk him out of it, and he even gets help from the brothers' mother.

Charlie finds himself in an uncomfortable position when Jake takes off with the daughter of a former NFL player. Charlie's Mercedes proves a boon to Alan's love life.

Chelsea is asked by Alan to arrange a blind date between he and her new friend, unaware that her new friend is Rose.

Charlie's friends and family put a crimp in his plan for a romantic Christmas Eve date. When Evelyn sees who the date is, she goes to great lengths to force a wedge between them.

Charlie is perplexed when Frankie, the mysterious woman temporarily living in the Harper household, begins falling for Alan and not him.

Alan starts dating a woman with a Martha Stewart complex. Before long she's running the house with an obsession for perfection.

Charlie writes a children’s song and finds success as Charlie Waffles. The children love him and the mothers seem to as well. Charlie's new found fame irritates Alan.

After getting unusually turned down at a bar, Charlie learns that a website has been made dedicated to exposing his lifestyle. Charlie sets out to find who created the site, making amends to all those he stood up, but it's harder than it looks when all the women take the apology better than expected.

Jake gets suspended from school after drawing an offensive picture of a girl in his class that has large breasts. Meanwhile, Charlie is asked to watch over Alan's chiropractic office after pulling an all-nighter.

Charlie is invited to a party hosted by a gay ad-executive named Eric, so Charlie asks Alan to pretend that he's his life partner. While at the party, Charlie meets Eric's ex-wife Pamela, and tries to sleep with her without Eric finding out.

Charlie tricks Jake into taking ballet lessons, so he can get close to the teacher.

Charlie has to remove a half-naked woman from his bedroom before Chelsea arrives.

Alan starts to worry about a medical procedure that he is facing, and to get his mind off it, Charlie suggests they go to Las Vegas.

While Charlie and Rose carry on their "affair," Alan's chiropractic business turns into a Ponzi scheme.

When Charlie discovers that Alan is sleepwalking, he believes it's related to his brother's lack of sex following his divorce, and comes up with a cure.

Charlie has a pregnancy scare involving one of his one-night stands and decides to go for the big "V," and we're not talking Vegas.

Charlie's still brooding over Alan's choice of their cousin as Jake's guardian if both parents die when the boy has an accident while in his care and has to be rushed to the hospital.

Charlie arranges a romantic date with Mia in the hopes of consummating their relationship. Alan begins to date Charlie's most recent ex-girlfriend.

Alan must face the consequences after revealing his identity to Larry.

Charlie is dating a woman whose personality and life are like his mother’s.

Charlie is shocked when the handyman working on his house beats him out for Chloe's affections. Alan has no sympathy for Charlie’s distress.

Alan looks forward to Judith's wedding, while Charlie and Myra continue their romance.

CSIs investigate a death at Charlie's house.

Charlie plays a tricky game when he gets involved with Alan's divorce lawyer, who could make things difficult for Alan if she were, say, dumped by a self-centered lothario.

Charlie has to come up with ways to keep his girlfriend's 4-year-old amused; Alan becomes a test subject.

Alan tricks Charlie into joining him and Judith in leading Jake and his classmates in the school's annual music show.

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

Mia comes back to town with her dance troupe and invites Charlie to her performance. At first, he decides not to go and tries to convince Alan that he no longer has feelings for her. He goes to the see the performance and Mia explains that she wants some of Charlie’s sperm. Charlie responds by asking Mia for something.

After an earthquake hits, Judith's house is damaged and she needs a place to stay. So Alan decides to invite her to stay with him and Charlie, without getting Charlie's permission. Charlie isn't happy with this, but accepts it. Alan becomes jealous when Judith goes on a date, and asks Charlie to find him a date, so that he can show Judith that he dates as well.

Rose tries to help the brothers sort out their feelings, when Charlie and Alan take their personal frustrations out on each other.

Charlie is surprised to find out that Kandi has been living with them for the last three weeks. Alan is having a tough time helping Kandi earn a living. Charlie has lost his sense because of the dry-spell he is going through.

Chelsea wants Charlie to take dancing lessons for the wedding, when Charlie uncovers the truth that Chelsea has been lying about her finances.

While overcoming a bad break-up, Chelsea invites her beautiful college roommate to stay at the house.

Charlie can't function when his housekeeper storms off because of Alan's constant complaints, so Alan tries desperately to woo her back. Meanwhile, Rose comes to Charlie for dating advice.

Charlie fights his attraction for Teddy's daughter.

Charlie invites a mysterious, slightly crazed woman to stay at the house until she can settle some family problems.

Strained relationships and girl-fighting result when a huge storm traps Walden, Alan, Zoey and Lyndsey in the house on Valentine's Day.

Charlie sees a therapist to learn how to deal with Alan's emotional insecurities.

Charlie has trouble keeping up with Mia's healthy lifestyle, so he begins to sneak beers, cigars, and burgers behind her back. When Mia finds out what he was doing, Charlie has to decide if he is truly in love with her or just whipped.

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 him advice. Alan and Charlie get nostalgic and remember their first boy-girl party.

Lyndsey finds out about Alan's relationship with Gretchen; Walden has a difficult time telling Barry to find his own place.

Charlie opts to have a colonoscopy in order to avoid going on a trip with Chelsea to see her parents. However, when he returns home, he finds her parents at his house.

When Chelsea convinces Charlie to let Alan's new girlfriend, Melissa, move in, the girls end up taking over Charlie's house.

Charlie tries to get Jake's approval on a theme song that he is hired to write for a television show, which is based on a comic book that Jake is a fan. While Alan finds out more about Rose (including how smart she is), when he spends more time with her.

After Charlie has back pain, Alan decides to take him to the Hospital. While there Charlie can't stop hitting on the doctor who is examining him. The only problem is that he has a history with her that he can't remember. Berta is feed up with Jake's inability to use the bathroom properly, so she decides to make him clean it until he learns.

Charlie and Jake fight for the affections of a waitress, while Alan fights sexual tension with his receptionist.

Alan's girlfriend, Gretchen, insists he confess his true identity to Larry. Meanwhile, Walden goes on a road trip with Jenny and Barry to see his first car.

Evelyn reads in the obituaries that her second husband, Harry has died. They all attend the funeral, including Jake who is excited at the opportunity of seeing a ""dead guy"". Charlie is excited by the opportunity of a newly single widow, and Alan is just happy to pay his respects to Harry.

Jake's sullen mood baffles and bothers the family and prompts Alan and Judith to take him to a child psychologist.

Charlie's desperate to make sure Chelsea and Evelyn don't befriend each other following their first meeting.

Walden joins his beautiful former employee on a brilliant new project. Meanwhile, Alan advises Jenny to open up to her girlfriend or risk losing her.

Jake sends Alan a Japanese delicacy; the house comes alive with questionable Christmas lyrics.

Alan finds out that Charlie stole his girlfriend and works on a plan to get back at Charlie, even though this happened when they were in high school.

Charlie's financial manager informs the carefree jingle writer that he spends money faster than his royalty checks come in, and now he must go on a budget.

Alan tries to escape Judith's grasp as Charlie and Herb go on the prowl to pick up women. They later end up going back to Herb's hotel room with two prostitutes, where Herb declares his love for Judith and races over to win her back.

Evelyn's boyfriend, Teddy, invites Alan and Charlie to go with him to Las Vegas on his private jet. The boys confront their individual 'daddy issues'

Walden thinks his girlfriend is cheating on him; Alan starts dating Larry's sister, Gretchen (Kimberly Williams-Paisley).

Alan's advice to Chelsea that she get breast-reduction surgery is not met with enthusiasm by Charlie, who kicks him out, but staying with Evelyn has its own challenges.

When Jake brings his 36-year-old girlfriend home for a visit, Alan is concerned; Walden tries to hide something from Alan.

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

Charlie Harper is alive. Or is he?

Charlie Harper is alive. Or is he?

Alan and Walden go to Kate's fashion show in New York so Walden can reveal the truth about his identity.

Alan and Jake meet Walden Schmidt, a broken-hearted billionaire.

Walden joins a group for adoptive fathers, and finds it to be a nice escape from Alan.

Walden plans a big surprise for Zoey's birthday.

Walden discovers how challenging it is to be intimate with women when his foster son, Louis, is in the house. Also, Herb asks Alan if he can go on a date with Lyndsey.

Alan breaks Walden's rules when he realizes that Louis thinks he's cool, and he wants it to stay that way.

Walden fears if he breaks up with Ms. McMartin, it will jeopardize his adoption of Louis. Also, Alan hesitates when Lyndsey asks him to move in with her.

When Alan breaks up with their social worker to get back together with Lyndsey, Walden worries it will affect Louis’ adoption.

A birth mother considers having Walden and Alan adopt her baby.

Walden becomes a foster parent to a 6-year-old boy, but worries about himself when they don't hit it off like he hoped.

Walden goes looking for Mrs. Right while Alan has an opportunity to reconcile with Lyndsey.

Walden deals with his ex-wife, Bridget.

Alan and Walden attempt to convince Louis that Santa Claus is real.

After they sign their divorce papers, Walden offers Alan the gift of his choice, but when Alan chooses something selfish and impractical, it puts his relationship with Lyndsey on the line.

Alan prepares Walden for a date with Bridget, while Jake decides to emulate Walden and drop out of school.

Alan has second thoughts about getting married after he's asked to sign a pre-nup.

Despite Alan's warnings, Walden starts dating Rose.

Alan and Lyndsey decide to spice things up in the bedroom.

Charlie returns to his bachelor lifestyle after Alan moves out of the house. Alan suffers a breakdown after his divorce from Kandi.

After a health scare on Halloween, Walden decides he needs to change his life.

Walden must choose between Zoey and Rose.

Walden and Zoey's relationship suffers after they share a near-death experience. Meanwhile, Alan wonders if Lyndsey has a drinking problem.

When Walden runs into his ex and they start talking about getting back together, Alan worries that she is not good enough.

Walden's ex-business partner shows up at the beach house looking to make peace.

Walden's mother arrives and Alan is smitten with her, even as she reveals a secret about Walden's past that sends him into a downward spiral.

Alan and Walden have a meeting with an adoption social worker that hinges on them being convincing as a loving couple. Lyndsey returns after 60 days in rehab.

When Walden gets tired of the complications that come with a traditional relationship, he hires an actress to be his girlfriend; Jake plans a rendezvous with Missi (Miley Cyrus) at the beach house.

Alan tries to hire his ex-wife's lawyer to help him win custody over the dog he and Kandi shared.

Walden starts to feel his age when a friend's daughter comes to town.

Depressed after his breakup from Courtney (Jenny McCarthy), Charlie goes to see his psychiatrist (Jane Lynch).

Marty Pepper (Carl Reiner) proposes to Evelyn; Alan and Walden plan a bachelor party for Marty.

Alan is showered with love and affection upon returning from the hospital, but Zoey isn’t so sure it’s deserved.

Jenny moves in with Evelyn and her wealthy boyfriend, Marty (Carl Reiner).

Alan takes it upon himself to help Walden keep Louis after the social worker discovers he and Walden are not really a gay couple.

Zoey tries to convince Walden to cut his hair and shave; Alan and Lyndsey revive their relationship.

Jake has a crush on his chemistry tutor, who has a crush on Walden. Meanwhile, Alan obsesses over the journal his brother left him in his will.

After a fight with Walden, Alan decides to move in with Herb.

Walden receives divorce papers from Bridget, but forgets his depression when he meets a girl who looks eerily like her.

Charlie's 25-year-old daughter arrives at the beach house, hoping to get to know her family.

Alan feels reluctant to make a commitment to Lyndsey, but an unexpected source inspires him; Walden enjoys being the boy-toy of a wealthy older woman.

Walden’s ex-wife and mother try to take control of his company, so he turns to Alan for help.

Walden is trying his best to impress his new love interest when Bridget reappears in his life.

Alan invests Walden's money in Kate's fashion line; leading a double life takes its toll on Walden.

Jake stops at nothing to get away from Charlie and Alan, after they embarrass him out in public.

Walden and Alan think it may be time for Berta to retire when she injures her back at work. When they suggest her retiring, she grows offended, and as the conversation progresses she quits. Walden and Alan then try different maids, with little success.

Charlie acts strange after spending an evening with his mother, and a woman Alan slept with behaves oddly the next morning.

Charlie's girlfriend gets fed up with his stalker, Rose.

Rose and Alan discover each other's secrets. Meanwhile, Charlie's desperate to get some time alone with Rose.

Jake is pressured to make a decision about his future.

When Charlie's ex-girlfriend Courtney is released from prison, he treats her to the good life despite her having been in prison for conning him.

Charlie tries to surf to impress Dottie, a beautiful woman he just met, but after he nearly drowns he is convinced that he saw his late father.

Charlie's ghost pays a visit to Alan after he suffers a minor heart attack.

Evelyn offers to pay for Jake's college education, and Alan becomes listless because he has no compelling reason to work anymore, while Jake discovers a hidden talent in the culinary arts that may allow him to bypass college altogether.

Alan tries for an intimate night at a hotel with his new girlfriend, while Charlie takes a different approach to obtain the "girlfriend experience"

Charlie's attracted to an older self-help author. Alan and Jake clash over a project for school.

In the 6th season opener, Charlie runs into an ex-girlfriend and a child who bears a striking resemblance to Charlie.

When Walden begins redecorating the beach house, Alan becomes overly emotional.

Zoey and Walden break up, causing Walden to experience a breakdown.

Charlie meets his match when he falls for a woman who's better at playing hard to get than he is.

Alan goes to great lengths to be able to get Lyndsey a nice birthday present.

Alan has trouble accepting Lyndsey's seedy movie past, and Walden tries to cheer him up by throwing a party.

Walden goes on a date with an accident-prone model; Alan's date reveals surprising personal information about herself to him.

Alan and Walden befriend three moms at a kids’ gym, but things get complicated when Walden becomes attracted to one of them. Alan goes out for a girls’ night with a group of moms.

Charlie's young, hot girlfriend takes him to a new club. She invites Alan to meet one of her friends but the men are shocked to learn that they are considered as being "old".

Jake gets lucky after Charlie takes him to the racetrack. Meanwhile, Alan has a difficult time at the DMV.

After Alan and Charlie have a fight about Alan's role in the house. Alan packs Jake up and moves in with his mother.

Worrying Charlie may get rid of one of them, Berta and Lydia fight over him. Meanwhile, Kandi does everything she can to stop Alan from selling their condo.

Alan and Lyndsey introduce their mothers. Jake and Eldridge get a ride from Walden to a party.

Walden hits it off with a British babe, but neither of them is sure he's ready to re-enter the dating world.

Judith is dating Jake's pediatrician, and Alan is upset until Charlie points out that if she remarries, his alimony payments will end.

Chelsea's illness gives Charlie a chance to prove he can take care of her, but also yearning to run away from the situation.

After moving in with Lyndsey, Alan continues to have a rendezvous with Melissa at Charlie's house.

Charlie runs off to Vegas and returns with a new wife, but she's not Chelsea.

Berta discovers that Alan has been dating her daughter Naomi.

Charlie suspects Chelsea likes the lawyer representing Alan after his arrest for a bar fight.

Charlie has difficulty dealing with dating a slightly older woman.

Jake shares that he has heard his mother having sex with her fiancée, Herb; this revelation brings up a repressed memory for Charlie. This leads Charlie to seek help from Rose.