Watch The Big Bang Theory Season 6 Episode 16 online via TV Fanatic with over 5 options to watch the The Big Bang Theory S6E16 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, and Google Play.
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Everything goes awry when Leonard arranges a special Valentine's Day celebration for Penny and her ex shows up and Sheldon has his research assistant find a present for Amy on The Big Bang Theory.