Preview — The Big Bang Theory Season 11 Episode 21: The Comet Polarization
Episode description: Sheldon’s comic book store experiences changes when writer Neil Gaiman puts Stuart’s store on the map. Also, Koothrappali takes credit for Penny’s astronomical discovery, and friendships are threatened.
Photos from The Big Bang Theory Season 11 Episode 21 (continued):


Promo video:
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The Big Bang Theory airs Thursdays at 8/7c on CBS.
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