Bernadette, played by Melissa Rauch, is a Cheesecake factory waitress that works alongside Penny.  Penny introduced her to Wolowitz and now the two are dating.

She's actually quite smart and is working her way through graduate school microbiology studies.

Bernadette Quotes

I'm the kind of girl who can get all the giant missiles she wants.

Bernadette

Penny: He wasn't intellectually stimulating enough.
Bernadette: Couldn't you just fool around with him and then listen to NPR?
Penny: Wouldn't help. Zack couldn't even spell NPR.

TBBT Quotes

They can't just cancel a show like Alphas. You know? They have to help the viewers let go. Firefly did a movie to wrap things up. Buffy the Vampire Slayer continued on as a comic book. Heroes gradually lowered the quality season by season till we were grateful it ended.

Sheldon

Leonard: Hi. I'm Leonard. You are beautiful. You pop, sparkle and buzz electric. I'm going to pick you up at eight, show you a night you will never forget.
Raj: Where are we going?