After an emotional roller-coaster episode last week, 'The Big Bang Theory" Season 8 Episode 11 titled "The Clean Room Infiltration" will return to TV via CBS on Dec. 11. In this episode fans will see Sheldon Cooper and his gang getting into some serious trouble.

The official synopsis of "The Clean Room Infiltration" posted by Broadway World reads, "Leonard and Wolowitz nearly come to blows and turn to Raj for help in dealing with a work emergency. Meanwhile, Amy throws an authentic Victorian Christmas party, and Sheldon seeks revenge on her for making him celebrate the holidays."

According to Christian Today, this is something very normal for Sheldon, who is absolutely against all things related to the holidays. However, viewers will see that Amy will not yield to Sheldon's fancies. Notwithstanding the resistance from her boyfriend, she will keep planning for a big, real Christmas celebration. Now it remains to be seen whether Amy is successful in organizing an impressive Christmas party, or will Sheldon succeeds in ruining all the fun.

In the meantime, fans continue to be swayed by the emotions they felt during the episode aired last week. In fact, the character of Sheldon seldom shares his affectionate side, but when he believes that "Sheldon Cooper Presents Fun with Flags" will be coming to an end, he abandons his guard and lets the viewers also be aware of the fact that he is unhappy to sacrifice one of his an important parts.

In the previous episode, viewers also came to know about Bernadette's fierce nature. However, she was surprised when Penny told her that all their co-workers were panicked due to her behavior and remarked that since her father trained her to be tough; she would not accept any nonsense from anyone.

While the different sides of the show's characters were revealed in 'The Big Bang Theory' Season 8 Episode 10, the ratings of the show declined slightly. According to Digital Spy, compared to the earlier episodes of the show, Episode 10 registered lower rating points.