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.
Ted explains to his future kids how a series of unrelated events led to a chance encounter with a former girlfriend. Barney makes the 200th notch in his bedpost. Marshall goes overboard when he discovers GNB has a department that can make him charts and graphs