Meanwhile Barney finds out that he is one-quarter Canadian.The gang reminisce about Hurricane Irene and Barney gets out of wearing the Ducky Tie by giving Marshall three extra slaps.He ends up losing this bet just before he can do the 'Shrimp in the Pocket' because Lily flashes him, causing him to lose his concentration.
He then vows never to lie to her again, and he is forced to tell her every single lie he has told girls to get them to sleep with him.
When Nora leaves, Barney vows not to leave the 24 hour diner until he gets a second date to show how serious he is.
Marshall finds out that his boss has given up on saving the environment and thinks that it is too late to save the planet. When Nora says that she hates Ewoks, Barney thinks that she is 37, not 29, because he thinks anyone younger than 37 would like Ewoks. Robin starts to date her therapist, and the gang find it creepy.
Ted takes his "Intro to Architecture" class on a Field Trip, but it doesn't go as planned.
She was telling her therapist that she was getting sick of Barney's romantic gestures to Nora, so when Nora went to France to cover a story, she was planning to use those three days to try to get Barney back, but the plan fails when Nora comes back early.
Meanwhile, Ted gets too involved with Lily's pregnancy, when he interferes with what their doctor tells her what she can and can't eat and drink.Robin makes awkward comments, but then Ted tries to make amends with her by cleaning her dishes at the bakery.The gangs thinks this means they slept together, but then Ted reveals that she is engaged, and she was only single for a day and a half after breaking up with Ted, before she started dating Klaus, her fiance, and Ted gets angry at her.On New Years Day, Marshall takes a trip to Minnesota to visit his father's gravestone.Where he tells his dad about the gang's New Years Eve events, which include Barney and Ted opening their bar, Puzzles, Marshall and Lily decorating their house up in Long Island, and Robin temporarily taking Sandy's place in reporting the New Year's Eve/Day countdown.Nora returns over 9 hours later, and is humbled by Barney's persistence.