The Big Bang Theory season 8 returns with a Christmas special episode today, 11 December, at 8pm ET on CBS.

Episode 11 is titled The Clean Room Infiltration, where Amy hosts a traditional Christmas eve dinner for the geeky gang.

Click here to watch the episode live stream online.

Click here to watch the episode online.

The official synopsis 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.

Amy had earlier announced that she wants to host a traditional English Victorian Christmas for the gang including parlour games, goose and figgy pudding.

According to spoilers, Sheldon, Amy, Leonard, Penny and others were out shopping for a Christmas tree, when Amy kisses Sheldon in public, which makes him unhappy.

He later decides to avenge the kiss by giving her a Christmas gift. In Sheldon's logic, since she has not bought a gift for himself, he feels gesture would ruin her Christmas and make her sad.

The first sneak peek shows Leonard and Wolowitz working in the clean room, and a pigeon flies in , which scares them. Later they call Raj for help in dealing with the bird emergency at work.

Another sneak peek shows everyone in Sheldon's apartment enjoying dinner, when Raj tells everyone about his parents hiring a divorce lawyer. Sheldon then says that if he ever needed an attorney, he would never hire She Hulk as a lawyer.

Watch the promo here: