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Luann enters the final stretch of her cabaret tour, while Dorinda tries to find her footing in Palm Beach; Sonja and Kelly put their clash behind them; meanwhile, a spa day goes awry when Sonja brings up some unfinished business with Dorinda.

After a tense night, Dorinda is determined to pull off the perfect Palm Beach hat luncheon for the ladies; but when Sonja arrives fashionably late, tensions flare and Dorinda's elegant afternoon quickly turns into a hat-astrophe.

Robin rediscovers a group of single girls who like to party; Ted pitches Barney a design for his company's headquarters.

Ted walks into the apartment and finds Robin's date sitting on the couch naked.

Ted and Barney pick a fight with a bunch of guys to improve their friends' perceptions of them.

Ted goes out of his way to keep his sister out of trouble when she comes to visit; Marshall introduces Robin to a Minnesota-themed bar.

Robin and Ted discover they get along better as roommates if they become friends with benefits; reality stars taunt Marshall from the pages of his magazine.

Lily and Marshall try to continue their airport reunion tradition; Barney and Ted offer to keep MacLaren's open during a blizzard so they can meet up with some college girls.

Robin, desperate to find a job before she is deported, agrees to let Barney produce a video resume for her.

The gang thinks that Barney must have a secret girlfriend after noticing his bizarre behavior.

Marshall and Lily are less than thrilled when they hear that Ted's college girlfriend (Laura Prepon) has moved to New York.

Ted learns that Lily not only planted another woman's earring in his bed for Karen to find, but she also meddled in some of his other relationships.

Barney and Marshall conspire to keep Ted in the dark when a client cancels plans to build its new headquarters using Ted's design.

Barney tries to prove Ted wrong by completing every task on Ted's list of things he thinks the gang is too old to do.

When Ted loses his job, he decides to start his own architectural firm.

Charlie tries to distract Alan from an upcoming medical procedure by planning a trip to Las Vegas.

Judith leaves Jake with Alan and Charlie while she spends a week in Hawaii, and the guys find that caring for Jake on a daily basis is much different from weekend visits.

While in a precarious position with a woman, Charlie injures his back and won't let Alan, a chiropractor, help him; after Alan drives Charlie to the doctor's office, Charlie is surprised to learn that his physician died four years ago, and a female, Dr. Michelle Talmadge, has replaced him; Berta teaches Jake a lesson.

When a gay ad executive invites Charlie to a cocktail party, Charlie makes Alan go with him, as his gay partner.

Alan asks one of Charlie's beautiful ex-girlfriends (Jeri Ryan) on a date, but while they are out he is tormented by thoughts of her with Charlie.

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

When Evelyn reads in the obituaries that her second husband, Harry, has died, she attends the funeral with Alan, then is furious to learn that Alan had kept in touch with Harry after the divorce.

After taking a loan from Evelyn, Alan is guilted into double-dating with her, her new romantic interest and his daughter.

Alan is reluctant to leave Jake with Evelyn for a sleepover visit until he finds himself partying with Charlie and a busload of beautiful female volleyball players.

Charlie unknowingly sleeps with an elderly man's (Orson Bean) hot trophy wife.

After Alan falls off the roof, Charlie volunteers to watch Jake for the weekend.

Alan must see the school principal over a picture Jake drew of a schoolmate and calls Charlie to watch over the boy.

Charlie organizes an intervention to keep Alan from reuniting with Judith.

Berta moves into Charlie's house for a few days and plays one brother against the other.

Charlie responds inappropriately to a woman's declaration of love, and Rose says his inability to have a long-lasting relationship is due to unresolved issues with his mother.

Charlie likes dating Isabella (Jodi Lyn O'Keefe), a wild, sexually uninhibited woman, until she threatens to put a curse on his manhood.

Rose's father (Martin Sheen) confronts Charlie about his intentions toward Rose.

Charlie cons Jake into taking ballet lessons in order to get close to the teacher.

Charlie tries to stop Jake from giving money to a televangelist; Alan is propositioned by one of Charlie's elderly neighbors.

Alan organizes a family dinner to celebrate a newspaper article that calls him a good doctor, good neighbor and a good guy; it does not impress his mother.

After a tense night, Dorinda is determined to pull off the perfect Palm Beach hat luncheon for the ladies; but when Sonja arrives fashionably late, tensions flare and Dorinda's elegant afternoon quickly turns into a hat-astrophe.

Ted and Barney pick a fight with a bunch of guys to improve their friends' perceptions of them.

Ted goes out of his way to keep his sister out of trouble when she comes to visit; Marshall introduces Robin to a Minnesota-themed bar.

Robin and Ted discover they get along better as roommates if they become friends with benefits; reality stars taunt Marshall from the pages of his magazine.

Lily and Marshall try to continue their airport reunion tradition; Barney and Ted offer to keep MacLaren's open during a blizzard so they can meet up with some college girls.