Robin’s musical past emerges again as the group learns of someone named Simon from Robin’s past. Barney searches for more Robin Sparkles memorabilia.

After Marshall witnesses a work buddy get yelled at after handing in a report, he becomes paranoid that the same will happen to him.

Barney’s efforts to hook up with women are being thwarted by a mysterious woman from his past. Barney and the gang must sift though his many past flings in an attempt to find out who she is.

Ted pursues a woman named Stella, but only gets attention from her receptionist Abby.

Ted lives like there’s no tomorrow during a St. Patrick’s Day celebration with Barney. Lily and Marshall spend the evening at their new apartment with Robin.

Ted’s upcoming date with his doctor leads the gang to give him their own examples of why dating someone you already see regularly is a bad idea.

When Barney loses his way with women, he hopes a trip to the Victoria’s Secret Fall Fashion Show will help him regain his form.

Lily and Marshall have their first Thanksgiving as a married couple; Barney is tortured by the slap bet countdown clock, worrying about when the slap will be dished out.

Marshall awaits his bar exam results; Ted introduces his latest girlfriend to the gang, who all see the flaw that Ted has missed

Marshall and Lily’s plan to buy an apartment is hampered by mistakes and Lily’s hidden debt.

Marshall has to contemplate giving up his plan of using his law degree to help the planet when he’s courted by a major firm; Lily reveals a secret to Robin that not even Marshall knows; Ted discovers a porn actor is using his name

Amid sharing stories with her about how members of the gang met each other, Ted’s hot new girlfriend has a reaction to the meeting that gets her a high ranking on Barney’s crazy scale.

Barney and Ted compete for a girl. Robin is dating someone new.

Ted’s new attitude attracts women in the present and one from his past. The rest of the gang pulls together to help him make the most of the situation.

Ted and Barney pretend to be visitors to New York City to pick up women. Robin is still dating Gael.

Robin shows up with a date and this motivates Ted to ‘get back out there’. We also learn something major about ‘the Mother’.

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.

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.

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.

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.

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 Marshall and Lily.

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 that they have spent together in the car. We also get the story of how Ted met Marshall.

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 to Lily.

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 when Barney got stuck on the subway.

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 doing the news puts Robin in danger of finding out who won.

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 portrait of him.

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.

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.

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.

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 refuses to go to the mall to cover her secret.

Marshall and Lily drag the gang to Atlantic City 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.

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 break them up. Also, Barney gets a new name.

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.

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.

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 named Anna shortly afterward.

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 longer together.

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.

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.

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 the fellowship in San Francisco.

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.