The Big Bang Theory 11×11 Promo “The Celebration Reverberation”

The Big Bang Theory 11×11 “The Celebration Reverberation” Season 11 Episode 11 Promo – Sheldon and Wolowitz plan birthday celebrations for Amy and Halley, respectively. Also, Leonard receives a Christmas letter from his brother that causes him to spiral out about his own lack of accomplishments, on THE BIG BANG THEORY, Thursday, December 14th on CBS.

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