THE BIG BANG THEORY Sneak Peek: And Baby Makes Nine?

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One story arc reaches its zenith tonight on THE BIG BANG THEORY, while another one stutters along.

It appears the big night finally arrives for the Wolowitzes. Tonight Howard and Bernadette gather the nerd squad at the hospital to welcome their new baby. While waiting for Howard and Bernadette’s big event, the supportive gang examines how much they’ve grown over the years — all except Raj and Stuart, who feel left in the wake by everyone else’s successes. Of course, last week they did get to battle it out over which was more supportive during Bernadette’s pregnancy. Well, it’s something.

It’s also Amy’s birthday, and Sheldon and Amy celebrate as only Sheldon and Amy can. A couple of weeks ago, Sheldon tried to spring a surprise brunch on Amy that didn’t go so well. What magic could he be planning tonight?

Enjoy the last new episode before the holidays. Watch the clips below and tun in to THE BIG BANG THEORY tonight (December 15) at 8:00 p.m. ET/PT on CBS (U.S.) and CTV (Canada).

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