The Holographic Excitation

The Holographic Excitation is the fifth episode of the sixth season of the CBS sitcom, The Big Bang Theory. The airing date of this episode is yet to be announced.

Plot
Stuart decides to organize a Halloween party at his comic book store so Raj decides to become the party planner. At the encouragement of Amy and Bernadette, Penny decides to take more effort to understand what Leonard does for a living. Meanwhile, Howard, who just gets back from space cannot stop talking about his time in space by making multiple references about space, which annoys Bernadette. Sheldon and Amy face a conflict when they cannot agree on the costumes to wear to the Halloween party.

Reference

 * Taping report by Roxanne