Robin begins to date a hunky Argentinean, leading Ted to go out with Barney for a legen... wait for it... dary night to forget about Robin moving on.

After seeing girls swoon for Robin's boyfriend, Gael, because he's not from New York, Barney and Ted try to pull themselves off as out-of-towners in order to meet girls.

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.

Robin dates a single dad, and to her surprise, bonds with the man's son, which causes her to worry that the relationship is too serious.

Ted's new girlfriend becomes jealous that the story about how Ted and his friends met is better than how she met Ted, resulting in her ranking on Barney's "crazy scale" to go through the roof.

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.

Lily and Marshall decide to buy an apartment, but nothing goes as it should. Later, Marshall learns about Lily's financial secrets when they apply for a loan.

Ted thinks he may have met the perfect girl, but the gang points out a flaw that changes his opinion of her, leading to a heated argument.

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.

Barney loses his 'mojo' and heads to the Victoria's Secret Fall Fashion Show party to try to get it back, but he's put to the test when he meets Heidi Klum.

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.

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.

After Ted is repeatedly rejected by his dermatologist Stella for a date, Abby, her receptionist becomes interested in 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.

When Marshall is verbally emasculated by his boss, he begins to think that taking a job with a corporate law firm was a big mistake.

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.

As Ted prepares for his thirtieth birthday by getting rid of old stuff he'll no longer need, Barney and Robin struggle with the ramifications of their night together and whether or not to tell Ted. Barney enlists Marshall's legal expertise to find a loophole in "The Bro Code", a list of do's and don'ts for all bros, but ultimately decides he just needs to come clean. And in a surprise blow, Ted "breaks up" with Barney, realizing their lives are going in a different direction and he's tired of the single life.

Ted may have ruined his relationship with Stella after he reveals an intimate secret about her to his friends.

As a couple, Abby and Barney have decided they agree on one thing, they both hate Ted, and decide the bar is a great place to flaunt their romance in front of him. Barney goes a bit overboard by doing something impulsive.

Ted is in a car accident that prompts Marshall to talk about miracles. Everyone flashbacks to prior moments in their lives.