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The gang try to break up Barney and Quinn after learning that the couple plan to move in together. Meanwhile, Ted and Robin argue over subletting her apartment.
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Despite the bare facts being revealed about Quinn's exotic profession, Barney realizes he has feelings for the young lady and sets out to win her over. Meanwhile, Lily and Marshall welcome Robin to the suburbs and Ted wo...
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Ted rocks Robin with a personal declaration about how he feels about her. Meanwhile, Barney tries to dig up some personal dirt on Lily and Marshall.
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Robin hears bad news, but hides it from everyone; and Marshall hangs Christmas decorations with a little help from his neighbor.
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Ted and Barney make a life-altering decision; and Robin tries to talk Lily and Marshall out of moving to Long Island.
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Robin and Barney keeps secrets from their respective significant others; and Marshall, Lily and Ted go to a concert.
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The friends recall their memories of Hurricane Irene; and Barney tries to get out of wearing the ducky tie
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The Slutty Pumpkin, played by Katie Holmes, returns, after Ted has searched for her every year at the same costume party since the Halloween they met and he lost her phone number.
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The gang discovers that their significant others remind them of their parents; and Barney and Nora's romantic night is plagued by mishaps
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Ted goes on a date without checking her out online first; and Lily and Marshall come to terms with the question of knowing the gender of their baby.
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Ted takes his class out on a field trip, but it ends badly; and Marshall thinks his boss is too weak in a settlement with a million-dollar company, and he decides to take action
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Barney tries to woo Nora (Nazanin Boniadi) and prove he has real feelings for her
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Ted meets an old girlfriend he had cheated on and tries to make up for his unfaithfulness; and Barney makes a bet with Lily and Marshall that could have Marshall wearing Barney's ducky tie
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When Marshall gets the job of his dreams, he worries that, once the company discovers videos he made in the past, they may rescind the offer. Meanwhile, Ted can't decide who to bring to the Architects Ball
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While Barney prepares for his wedding to a mystery bride, he and Ted reminisce about Punchy’s wedding, including when Marshall and Lily announced they are having a baby. Meanwhile, Robin considers telling Barney she ha...
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In the sixth-season finale, Ted is the best man at a wedding that changes his life; Marshall fears that he may become the victim of food poisoning; and Barney and Robin bond.
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Ted makes a tough decision that has a dramatic impact on his relationship with Zoey.
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Ted plans a romantic weekend with Zoey, while Marshall and Barney bicker over the fate of the Arcadian Hotel.
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Barney tries to make his life seem more exciting as he bonds with his father (John Lithgow); Robin encounters a guy she likes.
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Marshall quits his job at Goliath National Bank to volunteer at an environmental organization; Ted and Zooey continue to butt heads over the future of the Arcadia.
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Barney finally meets his dad, Jerry (guest star John Lithgow)
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Barney realizes he has heartfelt affection for Nora, and he thinks that something is wrong with him; and Robin dates a guy who acts like a dog.
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Marshall becomes obsessed with saving the environment after seeing a documentary on garbage; Ted runs into The Captain; Barney admits he has feelings for a woman.
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Barney declares Feb. 13 a holiday for desperate women; Marshall receives a Valentine's Day surprise from Lily; Zoey and Ted work on figuring out their relationship.
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Zoey arranges a date for Ted with her cousin, played by Katy Perry; and Ted realizes he has feelings for Zoey, and tells his friends he needs an intervention
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While on a trip to Minnesota, Ted and Barney try anything to make Marshall laugh; Marshall runs into an old nemesis from high school.
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Afraid they will never get pregnant, Lily and Marshall decide to see a specialist; Robin begins her new job.
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Lily and Marshall receive shocking news that has a profound impact on the gang; Ted begins his duties as best man for an old friend's wedding.
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Ted asks Zoey's husband (Kyle MacLachlan) to hang out; Robin and Marshall decide to spend some time together.
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The gang, minus Ted, parties all night with The Blitz (Jorge Garcia), an old friend from college; Ted is forced to spend Thanksgiving with Zoey.
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When Barney finds a copy of the kids' show featuring Robin's alter ego, the friends learn more about her past as a performer than they expected.
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The gang attends a black-tie fundraiser at the Museum; Ted meets Zoey's husband, the captain.
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When Zoey enrolls in Ted's class, she tries to convince his students to help save the building from being torn down for his project; Marshall and Lily notice Robin marching in the Halloween parade of shame.
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Marshall and Lily try to figure out how to conceive a baby with the gender of their choice; Robin's perky new co-anchor irritates her.
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Ted becomes conflicted after meeting an attractive woman who is passionate about saving the landmark building being torn down for his new project.
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When the gang teases Robin about not being a real New Yorker, she sets out to prove them wrong by racing to catch a glimpse of Woody Allen.
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Barney uses his best womanizing tactics to try to convince Ted to design the new GNB building; Robin drunk dials Don.
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When the gang helps Barney's mother move, they learn that she has lied to him about events throughout his life; Robin oversells Ted to a blind date.
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Ted runs into an ex-girlfriend (Rachel Bilson); Robin is upset over Don; Marshall can't stop talking about his desire to start a family.
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Marshall and Lily make a secret pact to start trying to have a baby if they ever finally see Barney's doppelganger. Meanwhile, Robin finally gets an offer for her dream job.
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When Ted takes a date to see a new hit movie, "," he is shocked to learn the story is loosely based on his life, and that it was written by Tony, the man Stella left him for at the altar.
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When Ted, Marshall, Lily and Barney crash a highfalutin party at a swanky New York apartment, Ted gets the chance to mingle with the snooty guests and show off his intellectual side.
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When Ted and Barney jeopardize Robin's new relationship by professing their love for her, Robin realizes that she is finally over them. Meanwhile, after spending a weekend sleeping in twin beds, Marshall and Lily decide ...
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When Ted attends his mother's wedding, he is extremely disturbed by her overly affectionate relationship with her fianc, which forces him to think about his own life and make an impulsive decision.
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When Marshall gets mugged, Lily decides she wants to get a gun for protection, so Marshall comes up with a convoluted story about the mugging to deter Lily from following through.
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When Ted ruins Lily's birthday dinner celebration by bringing a date, Lily goes to great lengths to keep her out of the traditional photo she takes every year of the gang.
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Barney is driven mad by a woman who seems to be following all the rules in a new guide book for single women. In fact, she's the one who wrote it...
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When a beautiful young woman "hooks" Ted (keeping Ted in reserve as backup while she pursues her own dream boyfriend), the gang discusses their own experiences both as the one who "hooks" and the one on the hook.
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Marshall and Lily set up Ted with one of Barney's discards as a Valentine's Day date. Meanwhile, Robin's invited to a party by a co-worker.
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When Barney is about to complete the perfect week - landing seven different girls in seven days - the gang roots him on in order to forget about their own miserable week.
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When Marshall's co-worker kisses him, he can't get Lily to believe it happened. Robin discovers she's the subject of a drinking game.
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Barney chooses between wearing suits and sleeping with a sexy bartender. Meanwhile, Ted gets ever closer to meeting "the mother".
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When Marshall picks up smoking again, it prompts Lily, Ted and Barney, ex-smokers all, to succumb as well. Meanwhile, Robin gets a new co-anchor at her show...
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When a perfect girl finally shows up, the gang tries everything to help Ted, while Marshall takes action when he discovers a letter written by younger himself.
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Barney's unhappy after a slap bet is bequeathed to Ted and Robin by Marshall. Lily's long-absent father arrives for Thanksgiving.
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Barney dusts off his "playbook" to help him back into the dating scene following his breakup with Robin.
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After Barney (Neil Patrick Harris) and Robin hit a rough patch in their relationship, Lily devises the perfect plan to break them up, calling in help from Robin's famous friend, Alan Thicke.
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Despite their best efforts to be the perfect couple, Barney's know-it-all attitude gets him in trouble with Robin and they are forced to ask Marshall and Lily for relationship advice
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Barney wants Robin to become an American citizen; Lily joins Marshall and Ted on their road trip.
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When Lily and Marshall realize that Robin and Barney are the perfect double-date friends, they try too hard to impress and come on too strong, forcing Barney and Robin to try to break up with them
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When Robin fears that Barney is cheating on her, she soon discovers that he is spending his evenings with Ted learning everything there is to know on how to date her.
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Ted realizes his blind date is the same girl he had a blind date with seven years prior. Meanwhile, the rest of the gang discover a Lily look-alike at a strip club.
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When Marshall and the gang finds out that Barney and Robin are hesitant to define their relationship, Lily forces them to confront their biggest fear. Meanwhile, Ted is anxious about teaching his first lecture at Columbi...
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As his 31st birthday nears, an all-nighter to try to get business has Ted realizing he may need to pursue another career than architecture. Meanwhile, Marshall tries to get him up to a rooftop surprise party.
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Ted is trying to find a new job, and when an old acquaintance tries to help nothing goes as planned. Barney tries to smooth talk his way out of a ticket.
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Ted explains to his future kids how a chance encounter with a former girlfriend changed his life. Barney makes the 200th notch in his bedpost.
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When Ted violates the 'three days rule' by continually texting with a girl he's just met, Barney and Marshall retaliate by impersonating her.
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Ted goes out on his own as an architect and hires an intern to help get things started, but the intern gets a little too close to others in the gang.
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Barney attempts to complete in a single day all the tasks from a list Ted made to prove the gang's not too old to do them.
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Marshall and Barney lie to keep Ted from finding out the headquarters he'd been hired to design for GNB has been cancelled.
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Ted is shocked to learn that Lily is responsible for many of his breakups with ex-girlfriends—including Karen.
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Ted's college girlfriend reenters his life and leaves Marshall and Lily remembering how much they hated her--a fact they never revealed to Ted.
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When the gang suspects that Barney has a girlfriend after he mysteriously leaves MacLaren's, they decide to follow him, only to find to their shock that Barney has a wife and child they never knew about.
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Robin relies on a video résumé prepared by Barney to land a job before facing deportation back to Canada.
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A blizzard hits New York City, threatenting a tradition of Marshall and Lily's and leaving Ted and Barney to keep MacLaren's doors open.
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Robin and Ted explore "friends with benefits" while living together. Marshall has trouble with a few reality TV stars.
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Marshall takes Robin to a bar with a Minnesota theme. Ted attempts to keep his visiting sister away from Barney.
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Ted—to prove he's not a milquetoast—and Barney—to impress Robin—pick a fight with a group of guys sitting in the gang's favorite booth at MacLaren's.
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The gang learns a new way to get their dates to sleep with them after Ted walks in on Robin's date sitting naked on the couch.
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Robin reconnects with a group of single partiers known as the "Woo Girls". Ted must present Barney a plan for his company's new HQ.
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Lily and Marshall are considering having a baby, but Lily wants advice from Ted and Robin, first. However, she soon finds they have very different views.
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The gang contemplate ways in which they'd handle an unwanted encounter with a person from their past.
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Deciding to wed in three days, Ted and Stella suddenly see their plans shattered by exes.
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When Ted is packing his stuff for his move to New Jersey, he discovers that the gang was going to hold an intervention for his engagement to Stella and demands they hold it anyway.
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When Stella's babysitter cancels, a night out turns into the gang hanging out at her place, and Ted talks up New Jersey... until he learns Stella wants him to move there after marriage.
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Marshall claims that he had the best hamburger in the world during his first week in New York City, but he forgot where the burger joint is located. The gang then hits the streets of Manhattan to help him find it.
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Stella has to give Ted an answer. Barney wants to say something to Robin.
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Ted is in a car accident that prompts Marshall to talk about miracles. Everyone flashbacks to prior moments in their lives.
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As their expenses continue to mount, Marshall and Lily decide to sell some of their possessions online.
Barney and Abby (guest star Britney Spears) go to the bar to flaunt their relationship in Ted's face. Barney a...
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Barney looks for a new bro after Ted leaves him. Ted and his girlfriend look forward to having sex for the first time together.
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When a guilt-ridden Barney breaks the "Bro Code," he struggles with the ramifications of his misstep.
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Robin's musical past emerges again as the group learns of someone named Simon from Robin's past. Barney searches frantically for more Robin Sparkles memorabilia.
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Marshall gets fed up at his job and everyone tells him different ways of dealing with it.
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When Barney's love life is sabotaged by a mystery woman, he turns to tournament bracketology to narrow down the field of 64 women with the most cause to hate his guts.
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Ted pursues a woman named Stella, but only gets attention from her receptionist Abby.
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Its St. Patrick's Day and Ted and Barney go to a party. With a weird theory that karma has been reversed, Ted does some things he is not proud of.
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Ted asks his doctor on a date and his friends try to discourage him from going out with someone he sees regularly recalling their own horror stories of bad experiences.
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After everyone joins a gym, Barney sees his "first" there and loses his ability to approach women upon learning that his performance with her, which began his streak of sexual conquest and confidence, was poor. After his...
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As Lily and Marshall host their first Thanksgiving as a married couple, Barney is tortured by the tick-tock of the Slap Bet countdown clock and the certainty of the exact moment the slap is going to be delivered. Meanwhi...
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Ted finds what he thinks is the perfect woman, but his friends all find a flaw. In doing so, however, they reveal their own shortcomings.
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When Lily and Marshall decide to buy an apartment, not only do they make every mistake in the book, but Marshall also discovers Lily's dirty little financial secret when they apply for a loan.
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When a corporate law firm courts Marshall, lawyer Jeff Coatsworth wins him over, forcing him to let go of his dream of saving the earth in favor of the almighty dollar. Guest star John Cho.
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When Ted's new girl becomes jealous because the story of how he and his pals met is better than the story of how she and Ted met, her ranking on Barney's "crazy scale" skyrockets.
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When "kid-unfriendly" Robin surprisingly forms a bond with the young son of the guy she is dating, she decides it is too serious and must figure out a way to let the little guy down.
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Ted bumps into Trudy (the girl who sneaked out Ted's bedroom window in "The Pineapple Incident"). While on a date with her, her sorority sister Rachel shows up and acts very interested in Ted.
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After seeing girls get weak in the knees over Robin's boyfriend Gael being from Argentina, Barney and Ted decide to pose as out-of-towners, in order to meet chicks.
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When Robin shows up with a new boyfriend, Ted decides he is ready to hit the town with Barney. Enrique Iglesias guest stars as Gael, Robin's new lover and Mandy Moore guest stars as Amy, a tattooed party girl Ted hooks u...
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It's still Marshall and Lily's big wedding day but now we're at the reception. Robin tries to tell a story but keeps getting interrupted. Barney tries his hardest to figure out Ted and Robin's secret.
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With everything going wrong on Lily and Marshall's wedding day, to everyone's surprise it's confirmed bachelor Barney who tries to fix it all.
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Thinking that Bob Barker may be his father, Barney is overjoyed to be a contestant on The Price is Right. Marshall and Lily try sleeping apart prior to the wedding.
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Robin attends Lily's bridal shower and finds the gift that she brought is out of place. Barney hires a stripper for Marshall's bachelor party.
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Barney takes drastic measures to prevent Ted from moving into Robin's apartment. Meanwhile, Marshall and Lily are discovering the ups and downs of having the apartment to themselves. Barney considers moving in with Marsh...
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Marshall is all set to celebrate his beloved Fiero hitting the 200,000 mile mark but it stops. While the gang sits in the mechanic's garage and waits to hear what will happen to the vehicle they think about times gone by...
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Lily gets asked to play in an off-off-off-off-Broadway play, and the gang shows up to support her. Ted and Robin get hung up on what each kept from their past relationships. Barney performs his own play to prove a point ...
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Ted can't seem to catch a flight to interview for his dream job and he and Robin contemplate why. The story unfolds backwards as they think about it they remember when Robin and Lily went hunting for a wedding dress and ...
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When a funeral conflicts with the Super Bowl, the gang vows to avoid hearing the score and watch it together on Monday. This proves difficult, as Marshall is threatened with the score by a boy in Lily's class, while doin...
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When Ted is constantly insulted by his former boss, who is now working for him on a project, he is told to fire the man, but he finds that a hard thing to do. Meanwhile, Barney offers Lily a lot of money to paint a nude ...
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Robin wants to tell Ted that she loves him, but she can't tell him. Meanwhile, her sister visits and brings her boyfriend, and Robin doesn't know how to react when her sister says she's ready to lose her virginity.
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Ted almost ruins Christmas for everyone when, still carrying around anger toward Lily, he calls her a horribly disgusting name. Robin tends to Barney while he has a cold.
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Barney's brother, James (Wayne Brady), visits and Robin, the only one in the group that has never met him, is suprised. But James has a surprise for Barney that he finds difficult to swallow.
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Ted and Barney discusses their viewpoints on knowing things about women. Barney thinks that the more you know the more likely you are to find a deal breaker. Ted wants to know the deal breakers right away, as Robin refus...
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Marshall and Lily drag the gang to to elope, and their quest to overcome the three-day wait for a marriage license crosses them with some Chinese gamblers, a ship captain, and a sexy novelty shirt.
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Marshall goes on his first real date post-breakup with Lily. Not only do Ted and Barney try to warn him that this girl has got the crazy eyes, but Lily decides to do everything she can to find out about this her and brea...
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Barney seduces Marshall's law professor in hopes of getting her to grade more leniently. Lily takes a job at Ted's office, where she promptly steals to teach Ted's boss a lesson.
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Marshall tries to get used to being single in a world that is very coupled-oriented. Barney intended one-night-stand won't go away. Barney uses Lily to get out of his "horrifying" situation. Lily finds a place to stay.
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After Ted and Robin's first big fight, Barney tries to convince Ted that being an architect is an easy in to picking up chicks. Lily and Robin start following his trail after discovering that Ted hit it off with a girl n...
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Ted's parents visit New York for their anniversary and he learns a family secret. Robin worries that they won't like her. Lily and Marshall try to adjust to the new format of their relationship now that they are no longe...
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Barney works with Marshall on his bachelor skills, which include hitting on women. Lily is back from her venture. Robin helps her look for a new apartment but gets sick of hearing about San Francisco.
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The gang tries to help Marshall get over Lily, especially when he finds a credit card bill that leads to a hotel in New York City where some of her charges are listed.
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Ted tries to keep Robin from going on a camping trip so that she can spend time with him. Barney enlists the help of an old flame to perform a rain dance. At the same time Marshall finds out about Lily's interview for th...
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When a matchmaking company calls Ted claiming they have found his soul mate, he is forced to postpone his date when Lily asks for his help.
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Lily, Barney and Robin attend a high school prom to scout out a potential band for Lily and Marshall's wedding reception. In order to get in Lily and Robin pretend to be the dates of two kids who were going alone. Ted an...
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Robin is nominated to receive an award for a news report and everyone needs a date to take to the show. Barney introduces Ted to Mary as a date that Ted can take to the show. Originally Ted is opposed to the idea of just...
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Robin, who is very lonely, asks Ted to come over to her apartment after 2 A.M., but he isn't sure if he wants to go as he has a phone call on the way over with his friends, and with Victoria on his mind
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Marshall interns at the corporation where Barney works and finds that he is becoming a shallow jerk as he tries to fit in with his Barney-like coworkers. Meanwhile, Ted feels guilty when he receives several gifts from Vi...
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Things are going great with Ted and Victoria's relationship, but when Victoria is offered her dream job, the couple have to make serious relationship decisions. Meanwhile Marshall and Lily set out to purchase their weddi...
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A mysterious tape arrives for Barney from one of his numerous ex-girlfriends, and the entire gang watches it. But, in order for them all to find out how she broke Barney's heart and made him into a suit-wearing bachelor,...
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After agreeing to take things slowly and not have sex for a month, Ted and Victoria decide that they have waited long enough. Meanwhile, Barney, "bro"less asks Robin to suit up and be his bro for the night.
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Ted finds a new woman at the wedding. They want to remember the evening so they don’t exchange last names or numbers; but Ted takes a big fall when he tries to find out her name.
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Robin accepts Ted'™s invite to a friend'™s wedding, but thanks to Ted, the couple may never make it down the aisle.
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Ted rents a limo to take the gang out to sample five New Year's Eve parties in a quest to find the perfect celebration.
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After being forced into knocking back 5 shots, so he will stop thinking, Ted goes on a partying rampage. The next morning he wakes up with a woman in his bed, but he does not know who it is. So he turns to his friends to...
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Ted and Robin are surprised to run into Barney when they volunteer at a homeless shelter on Thanksgiving. Lily is on the brink of freaking out when she goes to Thanksgiving dinner at her future in-laws house.
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As Lily becomes more of a permanent fixture in the apartment, Ted feels like he is being edged out of the mix by his engaged roomies. Petrified of being left alone and homeless, Ted tells Marshall that when he and Lily a...
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When a matchmaker with a 100% success rate turns Ted away because he is not compatible with any of the available women in her database, he is still determined that he is going to find his match. After getting information...
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Ted makes his yearly pilgrimage to the rooftop Halloween party in search of a girl dressed as a pumpkin who he met years ago. Meanwhile, Robin is dumped after driving her new boyfriend away with her independent ways.
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Ted and Barney start checking out the club scene with their friend Robin, whereas Lily and Marshall try to participate in some more "grown-up" activities, as they draw slowly nearer to their wedding.
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Ted's outlook on his continuing search for love is altered when he rediscovers a shirt that has not seen daylight in years. Meanwhile, Barney amuses himself by coaxing Robin into sacrificing her job by saying completely ...
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Ted agrees to let Barney spice up his love life, and ends up on a crazy adventure of flying to Philadelphia, encountering the law and visiting the Liberty Bell.
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In a desperate attempt for a second date, Ted invites Robin to a party he is throwing. However, she doesn't show up and he keeps throwing parties in the hopes she will finally arrive.
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When Ted's best friend Marshall proposes to his girlfriend, Lily, Ted realizes he'd better get a move on if he hopes to find true love. Ted soon meets Robin in a neighborhood bar, immediately becomes smitten and scores a...