Watch How I Met Your Mother Season 5 Episode 1 online via TV Fanatic with over 6 options to watch the How I Met Your Mother S5E1 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and Amazon Prime.
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The new season of How I Met Your Mother kicks off with an episode titled "Definitions." In it, Robin and Barney try to keep their romance secret.