Watch The Big Bang Theory Season 12 Episode 12 online via TV Fanatic with over 5 options to watch the The Big Bang Theory S12E12 full episode. Affiliates with free and paid streaming include iTunes, Vudu, CBS, Verizon On Demand, and CBS All Access (Via Amazon Prime).
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On The Big Bang Theory Season 12 Episode 12, Koothrappali tries to mend things with his ex-fiancée, Anu and Penny's ex-boyfriend, Zack, asks for Leonard's help.