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![Big Bang Theory' Season 9 Episode 17 spoilers: Sheldon gets a big birthday surprise on 'The Celebration Experimentation' [VIDEO]](https://www.ibtimes.com.au/sites/au.ibtimes.com/files/styles/v2_article_large/public/2016/02/25/rtr4t04b.jpg?itok=FJiecKxs "Big Bang Theory' Season 9 Episode 17 spoilers: Sheldon gets a big birthday surprise on 'The Celebration Experimentation' [VIDEO]")
Big Bang Theory' Season 9 Episode 17 spoilers: Sheldon gets a big birthday surprise on 'The Celebration Experimentation' [VIDEO]
The Big Bang Theory" The Celebration Experimentation (TV Episode 2016) - IMDb
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