Scoop: Coming Up on THE BIG BANG THEORY on CBS - Monday, December 25, 2017

On the episode "The Emotion Detection Automation"- Sheldon beta-tests an MIT invention after hearing it can help him read people's emotions. Also, Leonard can't hide his feelings when Penny announces her brother is coming to town, and Raj invites his ex-girlfriends over to give him dating advice, on a rebroadcast of THE BIG BANG THEORY, Monday, Dec. 25 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Laura Spencer, Katie Micucci, Alessandra Torresani and Katie Leclerc return as Raj's ex-girlfriends. (Originally broadcast 2/2/17.)

Leonard and Sheldon are brilliant physicists - geniuses in the laboratory but socially challenged everywhere else.

Enter beautiful, street-smart neighbor Penny, who aims to teach them a thing or two about life. Despite their on-again, off-again relationship in the past, Leonard and Penny have finally gotten married.

Even Sheldon has found a female companion, entering into a "relationship agreement" with neurobiologist Amy Farrah Fowler, and he recently took their relationship to the next level by proposing marriage.

In their free time, Leonard and Sheldon enjoy fantasy role-playing games with their ever-expanding universe of friends, including fellow scientists Koothrappali, Wolowitz and Wolowitz's adorable microbiologist wife, Bernadette, who is adjusting to life with their new baby girl.