Walden treats Alan to an image makeover, and he attracts a married woman with a much older husband who cannot satisfy her in bed.

Walden dates a sexy young woman, but is actually more interested in her grandmother. Meanwhile, Alan and Jake take a final road trip together before Jake leaves for Japan.

After Alan falls off the roof, Charlie has to look after the adolescent and increasingly obnoxious Jake for the weekend.

Alan must lobby Jake's principal to keep him from getting expelled, leaving Charlie to manage the chiropractic office for the day.

Walden is forced to deal with two freeloading Harpers when Charlie's daughter that nobody knew he had arrives at the beach house.

Charlie's daughter Jenny moves in with Evelyn and her 91 1/2 year old boyfriend, and Lyndsey cheats on her new boyfriend with Alan.

After it's revealed Alan and Judith have been trying to reconcile, Charlie, Evelyn, and Rose vie for the role of spoiler.

Alan looks for a new place after he invites Berta to stay at Charlie's house, bringing the brothers to blows.

Berta is injured on the job, and after getting in an argument with Walden over retirement, she decides to quit.

Walden makes a big mistake while partying with Jenny and her friends, and Alan has to make a big sacrifice to keep up appearances with Lyndsey.

Charlie's inability to reciprocate his girlfriend's love forces him to examine his relationships with women.

Charlie's Satan-worshiping girlfriend has a knack for the supernatural, and seems to be the cause of some strange happenings around the Harper house.

Alan's jealousy over being the "other man" causes him to spy on Lyndsey's boyfriend, and Walden tries to get Jenny started with acting lessons.

Alan begs Walden to set him up with an old family friend, "Wonder Woman" TV star Lynda Carter.

Charlie gets drunk and sleeps with Rose on her birthday. Rose says she knows it's no big deal. But her father quickly shows up at Charlie's house, under the impression that they've been dating for two years.

Charlie bribes Jake into taking ballet lessons so he can vie for the affections of the teacher. Things go awry, however, when Charlie and Jake find themselves competing for those affections.

Alan and Walden hook up with a pair of theme park princesses until Lyndsey's jealousy of Alan's new flame ruins everything.

A private investigator tells Lyndsey's boyfriend that she is cheating on him with Walden, and Rose tries to help keep Walden out of danger.

Charlie's elderly neighbor has an uncomfortable business proposition for Alan.

After Alan goes on a dinner with Jake, Charlie and Evelyn, he becomes fed up with seeking approval from women and decides to quit doing so with a little help from Charlie.

Walden has a date with an injury-prone model, and Alan sleeps with a woman who then reveals that she used to be a man.

Walden helps Jenny get a second date with a woman who is blowing her off, and Alan is propositioned by his new girlfriend's ex.

Alan's girlfriend Sandy is Malibu's answer to Martha Stewart, causing Alan and Charlie to pack on the pounds. Their desire for her fabulous culinary output is ultimately overwhelmed by her craziness.

After a disastrous evening out with his brother, Charlie decides it is time to see a shrink.

Walden is hired by a former employee he fired to write code for a new project, and Alan suffers an unfortunate tick bite while hiking with Jenny and her girlfriend.

Alan lets Lyndsey's boyfriend Larry set him up on a date, while Walden offers to help Nicole with her software project, so that she will have the time to date him.

Charlie has to decide whether he can really commit to a serious relationship with Mia, especially when sex is currently off the agenda. Unsurprisingly, his suggestion that he sleep with other women in the meantime falls on somewhat stony ground.

As Charlie tries to receive his version of benefits from the relationship he has with Mia, Alan starts dating Charlie's most recent ex-girlfriend.

Marty proposes to Evelyn, and she accepts. But after Alan and Walden throw Marty a bachelor party, he abruptly calls off the wedding.

After Alan learns that Lyndsey broke up with Larry and didn't tell him, he makes a big decision. Meanwhile, Walden sets out to prove that he's a man's man.

Forced to hide in his garage to enjoy a brace of beers and half a Cuban cigar, Charlie's attempts to keep his unhealthy lifestyle habits secret from Mia fall apart when she smells bacon on his breath, resulting in their first major argument since taking their relationship to a physical plane.

Jake's twelfth birthday approaches. Alan is busy with young, hot Kandi.

Alan turns to Judith for comfort after Lyndsey accepts Larry's marriage proposal, and Jenny is worried that Brooke is blowing her off.

Alan takes an interest in Larry's sister after "Jeff Strongman" agrees to be his best man, and Walden is concerned about his relationship with Nicole.

Charlie is nominated for an award, but he knows his rival Archie will win, as usual, so he doesn't want to attend it. Rose asks Charlie to help her with her boyfriend Gordon.

Alan is having financial problems: Kandi is too "expensive" for him.

Lyndsey discovers that Alan is sleeping with Larry's sister, Gretchen. Meanwhile, Walden finds it difficult with telling Barry to find his own place.

Walden's reunion with his ex-girlfriend Kate does not go as planned, and Alan takes Gretchen over to "his apartment."

Charlie learns that Kandi has been living with them for three weeks. It turns out he hasn't even noticed some furniture changes. Alan wants to try her as secretary, but Charlie doesn't think she's smart enough for that.

Alan is made to admit to Charlie, who keeps hitting it in, he has hit rock-bottom now that his brainless girlfriend Kandi has moved in with his ex. It's all so confusing that Jake would prefer dad's ladies to be lesbians, then tells him Kandi's mom Mandi has joined Charlie's endless list of sexual conquests. Alan can't talk to Kandi, she just repeats Judith's phrases, clearly without understanding the words, but he sees her dad, Mandi's ex Andy, arrive on blind date with his own ex Judith. Frolicking finale at Judith's, in rooms, bed and hot-tub.

Just as Walden is considering proposing to Kate, he falls for a random stranger who arrives at his beach house. Meanwhile, Gretchen discovers that Alan's "Jeff Strongman" persona is a lie.

Walden's therapist tells him to have plenty of random casual sex to help get over falling in love too quickly, and Alan's new business venture provides him with the perfect opportunity.

Alan turns to Jake's teacher for stimulating conversation, since Kandi obviously can't provide any. But the teacher starts to get the wrong idea about Alan's intentions.

Jake has his first boys-girls party, dating a smart girl, Wendy Cho. Alan was looking forward to coaching his son, but even Jake, who spends his schooldays watching the clock tick, isn't dumb enough to consider dating advice from the worst womanizer in L.A., while Charlie proves he can coach a virtually hopeless case -Alan and Judith's genes without the IQ- trough appearance, dance and anything else. In fact Alan envies Jake so much, he still hopes for ...