Tonight is the Season 6 fall finale of The Big Bang Theory, and the gang is celebrating with Dungeons & Dragon -- because they're nerds! Get it?! They're geeks and they like geeky things! In addition to the game, Sheldon will go through some Christmas memories while Koothrappali joins the girls for a night out. Spiked egg nog drinking game: take a drink every time someone mentions Star Trek, Doctor Who or Lord of the Rings. Actually, don't. You might die.

The Season 6 fall finale of The Big Bang Theory is on tonight at 8 PM on CBS, opposite the Season 1 fall finale of Last Resort on ABC and the Seaosn 4 fall finale of The Vampire Diaries on The CW. At 8:30 is the Season 2 fall finale of Up All Night on NBC. After that is the Season 1 fall finale of Beauty and the Beast on The CW, the Season 4 winter finale of Glee on Fox, the Season 9 fall finale of Grey's Anatomy on ABC and the Season 2 fall finale of Person of Interest on CBS, all at 9 PM. Finally, the Season 1 fall finale of Elementary is on at 10 PM on CBS, opposite the Season 2 fall finale of Scandal on ABC.

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