Be warned, How I Met Your Mother fans. As you can see in this promo, Barney is about to become a changed man.
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How does Barney get played by Quinn? Find out in this promo for the How I Met Your Mother episode "Karma."
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Becki Newton appears on this episode of How I Met Your Mother and, as you can tell, she's a mirror image of Barney. We can't wait.
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Ready for the worst housewarming party ever? Watch this CBS promo for "The Burning Beekeeper."
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Barney tries to make a new friend in this clip from How I Met Your Mother. It's courtesy of the show's 150th episode.
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Marshall and Lily are moving to the suburbs?!? This will be the main storyline on the 150th episode of How I Met Your Mother, as previewed here.
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Marshall returns to his father's grave to ring in the new year on How I Met Your Mother. Watch the official CBS promo for the first episode of 2012 now.
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Barney reacts to Robin's bombshell in this fun scene from How I Met Your Mother. Multiple times.
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HIMYM Quotes

Whatever you do in this life, it's not legendary, unless your friends are there to see it.

Barney

You will be shocked kids, when you discover how easy it is in life to part ways with people forever. That's why, when you find someone you want to keep around, you do something about it.

Ted