The Big Bang Theory Episode 9×15 “The Valentino Submergence” Promo

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CBS has released photos and clips from tomorrow’s all-new Valentine’s Day episode of The Big Bang Theory titled “The Valentino Submergence.”

"The Valentino Submergence"

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Amy is confused by Sheldon's intriguing flag.

Episode synopsis: 

Sheldon and Amy host a live Valentine’s Day episode of Fun With Flags, while Leonard and Penny grapple with getting older. Plus, Howard and Bernadette find a surprise in their hot tub, and Raj is torn between Emily and the cute girl he met at the comic-book store on the next episode of The Big Bang Theory entitled “The Valentino Submergence.”

Catch this all-new episode Thursday night on CBS!