Watch The Big Bang Theory Season 12 Episode 21 online via TV Fanatic with over 5 options to watch the The Big Bang Theory S12E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, and Google Play.
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On The Big Bang Theory Season 12 Episode 21, Kripke has proof that Dr. Pemberton plagiarized his thesis and Sheldon and Amy aren't sure if they should turn him in.