Tonight at 7:00pm

“The Positive Negative Reaction” – The gang celebrates news of Bernadette’s pregnancy by singing karaoke; Wolowitz’s reaction to the pregnancy announcement worries Bernadette; Wolowitz believes he needs to make more money to support his growing family.


“The Celebration Experimentation” – For the first time in nine years, the gang celebrates Sheldon’s birthday — surprising him with a special guest.