Jenkins
When Marshall’s co-worker kisses him, he can’t get Lily to believe it happened. Robin discovers she’s the subject of a drinking game.

Girls Vs. Suits
Barney chooses between wearing suits and sleeping with a sexy bartender. Meanwhile, Ted gets ever closer to meeting the mother.

Last Cigarette Ever
When Marshall picks up smoking again, it prompts Lily, Ted and Barney, ex-smokers all, to succumb as well. Meanwhile, Robin gets a new co-anchor at her show…

The Window
When a perfect girl finally shows up, the gang tries everything to help Ted, while Marshall takes action when he discovers a letter written by younger himself.

Slapsgiving 2: Revenge of the Slap
Barney’s unhappy after a slap bet is bequeathed to Ted and Robin by Marshall. Lily’s long-absent father arrives for Thanksgiving.

The Playbook
Barney dusts off his playbook to help him back into the dating scene following his breakup with Robin.

The Rough Patch
After Barney (Neil Patrick Harris) and Robin hit a rough patch in their relationship, Lily devises the perfect plan to break them up, calling in help from Robin’s famous friend, Alan Thicke.

Bagpipes
Despite their best efforts to be the perfect couple, Barney’s know-it-all attitude gets him in trouble with Robin and they are forced to ask Marshall and Lily for relationship advice

Duel Citizenship
Barney wants Robin to become an American citizen; Lily joins Marshall and Ted on their road trip.

The Sexless Innkeeper
When Lily and Marshall realize that Robin and Barney are the perfect double-date friends, they try too hard to impress and come on too strong, forcing Barney and Robin to try to break up with them