Season 5 Episode 15 – Rabbit or Duck
Marshall and Lily set up Ted with one of Barney's discards as a Valentine's Day date. Meanwhile, Robin's invited to a party by a co-worker.
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Season 5 Episode 14 – The Perfect Week
When Barney is about to complete the perfect week - landing seven different girls in seven days - the gang roots him on in order to forget about their own miserable week.
Season 5 Episode 13 – Jenkins
After Marshall's attractive female colleague kisses him, Lily refuses to believe it, resulting in Marshall convincing Jenkins into telling Lily that it really happened. Meanwhile, Robin uncovers a drinking game which, apparently, is made up about her.
Season 5 Episode 12 – Girls Vs. Suits
On the 100th episode, Barney must choose if he should give up wearing suits in order to land a hot bartender, but his conflicted feelings result in an amazingly awesome musical number. Meanwhile, Ted gets closer to meeting the future mother of his kids.
Season 5 Episode 11 – 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...
Season 5 Episode 10 – 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.
Season 5 Episode 9 – Slapsgiving 2: Revenge of the Slap
When Lily's estranged father shows up unannounced on Thanksgiving, we learn what led her to stop speaking to him three years ago
Season 5 Episode 8 – The Playbook
Barney dusts off his "playbook" to help him back into the dating scene following his breakup with Robin.
Season 5 Episode 7 – The Rough Patch
Lily comes up with a perfect plan to break up the relationship between Barney and Robin when they have a rough patch, but she needs help from Robin's famous friend, Alan Thicke, in order to make it work.
Season 5 Episode 6 – Bagpipes
Even though they do their best in order to be the perfect couple, Barney's attitude of know-it-all lands him in trouble with Robin and they are forced to seek Marshall and Lily for advice.