2021

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.

Barney runs into problems when he displays his cell phone number during the Super Bowl, Ted asks Marshall and Lily to arrange a marriage for him, and Robin thinks that her co-anchor has asked her out on a date.

When the gang tries to convince Ted that he is being strung along by Tiffany, they reflect about relationships where each of them has been in the same situation.

After the guys discover that Robin deliberately got Barney hooked up with an incompatible female writer, they find out that that they didn't realize that Robin hasn't been handling their breakup very well.

Ted angers Lily when he brings a random date to her birthday party, so she is forced to remind him of all the other random women he has brought along to important functions, only to discover that they weren't "the one."

Marshall comes up with a number of different outrageous and embarrassing stories to explain how he was mugged in Central Park, but which of his stories is the truth?

Ted reacts to his mom's second wedding by making the capricious decision to buy his "dream house," while everyone tries to figure out whether Barney or Robin cried at the wedding.

As Robin contemplates moving in with her new boyfriend Don, Ted and Barney both decide that they want her back. Meanwhile, Marshall and Lily think they've revolutionized modern marriage when they begin sleeping in separate beds.

Barney is worried that the old gang is falling apart when Ted blows off a "Wrestlers vs. Robots" competition so that he can stay at a snobby party.

Ted is livid when he discovers that the man Stella left Ted for at the altar wrote a blockbuster movie about the incident, and portrays Ted as the bumbling, mean-spirited bad guy.

Ted musters up the courage to talk to a girl at the bar, but then discovers she's there with one of his exes. Meanwhile, Lily is mad at Marshall because he told his dad they're trying to have a baby, and Robin lets herself go.

The gang accompanies Barney and his brother James after they find the man who may be Barney's father, but it turns out to be James' father instead.

When Ted declines Barney's offer to design the new GNB building, Barney tries to woo him by using all of his best womanizing tactics. Meanwhile, Robin is still not over her relationship with Don and drunk dials him.

The guys race each other, each using a different form of transportation, from the pub to a restaurant seven miles away because a friend claims that Woody Allen is there.

Is Ted having second thoughts about designing GNB's new skyscraper because it would tear down a landmark, or because he's trying to impress a woman? Meanwhile, Lily shares a secret about Robin's new boyfriend with Marshall.

Marshall takes steps to make sure that he and Lily have a baby boy, but Lily has other ideas. Meanwhile, when Ted begins dating Robin's co-anchor, Barney is inspired to use baby talk to pick up women, and Robin feels betrayed.

Everyone tries to figure out whom Robin slept with Halloween night, and Zoey, the GNB skyscraper protester, finds a way to turn Ted's class against him.

Ted and Zoey's feud continues during a fundraiser at the Museum of Natural History. Meanwhile, Marshall confesses to Lily that he enjoys his job at GNB, and a prank by Barney and Robin may lead Barney to his real father.

While Barney finds a new video from Robin's Canadian teen star past, Lily fears that a baby could come between her friendship with Robin. Meanwhile, Ted's obnoxious old friend, "Punchy," comes from Cleveland for a visit.

When Ted leaves the bar early to prepare a Thanksgiving feast for his friends, the gang winds up partying all night with The Blitz, an old friend from college who has bad luck. As a result, Ted is forced to spend Thanksgiving with Zoey.

Ted goes on a boating trip with Zoey's husband, "The Captain." Meanwhile, Barney's "Mermaid Theory" prevents Marshal from having a nice dinner with Robin, and the narrator tries to recall the details of a fight between Lily and Barney.

Barney and Robin contemplate drastic positive changes in their lives when Marshall and Lily announce that Lily is pregnant, but renege on their promises when Marshall and Lily tell them that it was a false positive.

Marshall suspects that he is the reason Lily can't get pregnant after meeting a fertility doctor who also happens to be Barney's doppelganger. Meanwhile, Robin's embarrassing past is revealed at work by her former co-anchor.

The gang tries to support Marshall and Lily tries to help his mom during Marshall's father's funeral, but Marshall becomes preoccupied when he discovers that he has one final voicemail message from him.

Ted discovers that he is in love with Zoey after she tries to set him up on a date with her naive cousin, and he cuts off their friendship as a result. But little does he know that her marriage status has changed and she loves him too.