The Show's Title Was a "Fake-Out"
http://xfinity.comcast.net/articles/entertainment-eonline/20140402/b527547/?cid=hero_media
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Josh Radnor was one of the few people who knew how How I Met Your Mother would end from the very beginning. "They had mentioned to me the twist about the mother in the first season, and I kind of put it out of my head," said the TV star, whose character, Ted, ended the series by asking out Cobie Smudlers ' character, Robin, several years after the death of his first wife, Tracy, played by Cristin Milioti.
http://xfinity.comcast.net/articles/entertainment-eonline/20140402/b527547/?cid=hero_media
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