CBS reveals Sheldon and the geeky-gang’s Halloween costumes in a new preview for this week’s episode of The Big Bang Theory.

The Big Bang Theory‘s yearly Halloween episode is shaping up to be a doozy, and in a new promo for “The Holographic Excitation”, CBS reveals the costume choices for most of the cast. Check out the video below!

It looks like Howard and Bernadette will be Smurf-ing it up for their first Halloween as a married couple, while Leonard and Penny celebrate their differences as Albert Einstein and a sexy cop. (Don’t worry, Penny goes as the cop.) As previously reported, Sheldon and Amy appear to be working at cross-purposes when it comes to coordinating Halloween costumes; Amy is dressed as Raggedy-Anne, but instead of Andy, Sheldon shows up as “Raggedy-C3P0″. Can’t wait to hear the story behind that one!

The only regular cast member who’s costume remains a secret is Raj, but as his new BFF Stuart seems to be dressed as Willy Wonka, possibilities for speculation abound. (We’re hoping for an awkward Indian Oompa Loompa.)

And be sure to take a look at these photos for the episode, which include our first look at Buzz Aldrin’s cameo and a frighteningly funny glimpse at the way Sheldon and Amy’s brilliant brains really work.
[scrollGallery id=910 start=1 autoScroll=false thumbsdown=true]

“The Holographic Excitation” airs Oct. 25 at 8 p.m. The official summary says:

The gang celebrates Halloween at Stuart’s comic book store. Meanwhile, Leonard seduces Penny with science.

What are you looking forward to in “The Holographic Excitation”?