Season 4, Episode 19 (Murtaugh): Barney tries to complete, in one day, all the tasks from a list Ted made to prove the gang's not too old to do. Meanwhile, he challenges Ted to complete a list of things they're too young to do.
Season 4, Episode 18 (Old King Clancy): Marshall and Barney lie to keep Ted from finding out the headquarters he'd been hired to design has been canceled.
Season 4, Episode 17 (The Front Porch): 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.
Season 4, Episode 16 (Sorry, Bro): Ted's college girlfriend reenters his life and Marshall and Lily remember how much they hated her.
Season 4, Episode 15 (The Stinsons): Suspecting he has a secret girlfriend, the gang follows Barney when he leaves MacLaren's and discovers that he seems to have been keeping a family secret from them.
Marshall and Lily reveal details of their sex life to a cab driver.
Mary Beth and Natalie join the limo party.
Ted finally fires Druthers.
Lily agrees to paint Barney nude for money.
Ted and Robin talk about their first fight.
Barney dresses up like Maverick from Top Gun in an attempt to lure Ted to a Victoria Secret party.
Robin tells Ted that she's secretly married to a Canadian.
Barney uses magic to impress a lady.
Ted asks Robin out on a date and she throws a drink in his face, after she says, "yes."
Ted and Barney hit the bar and remember how they met while playing a game of "Have You Met Ted?"
The gang makes fun of Marshall over the nude painting that Lily made of him.
How I Met Your Mother: Season 6 clip - starring Josh Radnor, Jason Segel, Cobie Smulders, Alyson Hannigan, Neil Patrick Harris, Bob Saget.
Ted asks a girl on a date while Marshall asks Lily to marry him.
Ted and Marshall's sword fight over the apartment goes wrong when Lily gets stabbed.
Ted gets a lesson about the dangers of a long distance relationship.
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