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.
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.
Barney creates a holiday to celebrate not being a father. Meanwhile, Lily and Marshall are considering having a baby, but Lily first wants advice from Ted and Robin.
A birthday party for one of Lily's co-workers leads to Robin connecting with a group of single partiers known as the "Woo Girls". Ted presents a plan for Goliath National Bank's new HQ.
Robin relies on a video résumé prepared by Barney to land a job in broadcasting before facing deportation back to Canada. Marshall suffers from 'dancer's hip'.
Suspecting he has a secret girlfriend, the gang follows Barney when he leaves MacLaren's and discovers he seemingly has been keeping a family secret from them.
Ted's college girlfriend reenters his life and leaves Marshall and Lily remembering how much they hated her, while Barney tries to steer the storytelling towards Marshall's forgetting his pants at work that day.
Ted is shocked to learn that Lily is responsible for many of his breakups with ex-girlfriends-including Karen. Meanwhile, Marshall defends his wearing of a nightgown to bed.
Marshall and Barney lie to keep Ted from finding out the headquarters he'd been hired to design for GNB has been cancelled. The gang try to decipher the story of a celebrity encounter Robin once had.
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. Meanwhile, he challenges Ted to complete a list of things they're too young to do yet.
Ted goes out on his own as an architect and hires an intern to help get things started, but all he helps himself to is Robin. Meanwhile, news of impending layoffs at GNB has Marshall looking for a schtick to make him indispensible.