Watch How I Met Your Mother Season 3 Episode 9 online via TV Fanatic with over 8 options to watch the How I Met Your Mother S3E9 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, Xfinity, FX, and Lifetime.
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Lily and Marshall host their first Thanksgiving dinner as a married couple. Marshall tortures Barney with the countdown of his next slap from their previous Slap Bet.