The Big Bang Theory: The Valentino Submergence

A new episode of The Big Bang Theory, titled "The Valentino Submergence," airs tonight on CBS.

Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny grapple with getting older, 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 Bookstore.

Check out sneak peeks and a promo for the episode in the videos below.

"The Valentino Submergence" episode of The Big Bang Theory airs tonight at 8PM on the CBS Television Network.