After a series of conflicts between Sheldon and his friends in the past episodes, "The Big Bang Theory" season 11 episodes 10 and 11 will feature celebrations. Episode 10 will tease the upcoming wedding of Amy and Sheldon, while episode 11 will highlight the birthday celebration of Amy.

Fans of the series are aware that Sheldon and Amy have been planning their wedding. The synopsis for episode 10, titled "The Confidence Erosion," hints that the pair will try to eliminate the stress from wedding planning by applying math to it.

The pair will have a challenging time planning for their upcoming marriage. They will argue whether to use butterflies instead of confetti. They will also have a hard time deciding whether to say their wedding vows in Latin or in Klingon. After a long argument, Amy will suggest to Sheldon to simply choose a date and they will just do it. Sheldon will surprise Amy by saying that he wants the wedding to happen the next day.

Meanwhile, episode 11, titled "The Celebration Reverberation," will see Sheldon and Wolowitz planning for the birthday of Amy and Halley. Reports reveal that Amy's birthday theme will be "Little House on the Prairie." Amy's birthday became an important part of the show since it was the time when she slept with Sheldon for the first time.

Aside from Amy's birthday, Howard and Bernadette's daughter, Halley, will also be celebrating her natal day. This will make two birthday celebrations in one episode. For "The Big Bang Theory" fans, this may mean that fun and excitement are doubled.

In the same episode, Leonard will receive a Christmas letter from his brother Michael. This will make him question his lack of accomplishments in his life. What makes this storyline interesting is the involvement of Leonard's brother since no one from his family has actually appeared on the show. Leonard's family were not present during his wedding with Penny and in other special celebrations. Will fans finally see his brother in this episode?

"The Big Bang Theory" season 11 episode 10 will air on Dec. 7 at 8 pm EST on CBS. Meanwhile, episode 11 will air on Dec. 14.