The Big Bang Theory 10×12 Promo “The Holiday Summation”

The Big Bang Theory 10×12 “The Holiday Summation” Season 10 Episode 12 Promo – Sheldon and Amy visit Leonard and Penny for the first time since the holidays and share details about their terrible trip to Texas, on THE BIG BANG THEORY, Thursday, January 5th on CBS. Laurie Metcalf returns as Sheldon’s mother, Mary.