It’s Ted’s 31st birthday; Barney gets ready to profess his love to Robin; and Marshall wants to take the leap.

Start Watching Season 4 Episode 24 – The Leap

Start Watching Season 4 Episode 23

Tony tries to make things right with Ted after stealing Stella from him;

Ted explains how a series of random events led him to meet to a pivotal woman while he had a yellow umbrella.

Start Watching Season 4  Episode 22 – Right Place Right Time

When Ted violates the three day rule by texting a girl he just met, Barney and Marshall pretend to be the girl to mess with him.

Start Watching Season 4 Episode 21 – The Three Days Rule

Ted starts his own architecture firm and hires an intern to get things started, but the intern gets too close with members of the gang.

Start Watching Season 4 Episode 20 – Mosbius Designs

When Barney finds out that Ted made a list of things he thinks the gang is too old to do, Barney attempts to complete the whole list in 24 hours to prove them wrong.

Start Watching Season 4 Episode 19 – Murtaugh

Ted is shocked when he finds out that he was fired from building the new GNB headquarters months ago and that Barney and Marshall went through great lengths to hide it from him.

Start Watching Season 4 Episode 18 – Old King Clancy

When Ted’s girlfriend, Karen (Laura Prepon), discovers Robin’s earring in his bed, Ted finds out it was actually Lily that planted it there and she’s been sabotaging his relationships for years.

Start Watching Season 4 Episode 17 – The Front Porch

Ted’s old college girlfriend Karen (Laura Prepon) comes back into Ted’s life, making Marshall and Lily remember just how much they hated her, something they never told Ted.

Start Watching Season 4 Episode 16 – Sorry, Bro

The gang meets Barney’s wife and kid they never knew existed. Of course, we know it’s all just a show for his mother.

Start Watching Season 4 Episode 15 – The Stinsons