The Big Bang Theory - Trivia Question of the Day! What Halloween costume does Sheldon wear to Penny's party? A. Superman B. The Flash C. The Doppler Effect D. The Green Lantern
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Amazon.com: Sheldon Nerdy Doppler Effect Halloween Costume Science Gift T-Shirt : Clothing, Shoes & Jewelry
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Mens Black & White Sheldon Cooper Doppler Effect Costume Halloween – Rex Distributor, Inc. Wholesale Licensed Products and T-shirts, Sporting goods,
![Tom Bergeron on Twitter: "Happy Halloween 2019 from @ROINJNews. Big Bang Theory fans will get the Sheldon Cooper/Doppler Effect costume. (others can ask @NJSTEMPathways or @RDCouncilNJ) Be kind to those with #Bluepumpkins ( Tom Bergeron on Twitter: "Happy Halloween 2019 from @ROINJNews. Big Bang Theory fans will get the Sheldon Cooper/Doppler Effect costume. (others can ask @NJSTEMPathways or @RDCouncilNJ) Be kind to those with #Bluepumpkins (](https://pbs.twimg.com/media/EINg2hDWsAAIlaB.jpg:large)