For example, in “The Cognition Regeneration,” we learned that Bernadette (Melissa Rauch) is a ventriloquist. ... When Bernadette was in beauty pageants as a kid, she needed a talent other than spreading rumors that that the other contestants were pregnant, so she got Tammy.

Does Bernadette really have a squeaky voice?

The actress just decided to talk like that when she went in to audition, and it immediately stuck with the character. Here's what Melissa Rauch had to say: ... That was something I did in the audition and then ran with it. That's actually my real voice and this is my fake voice.

Is Howard Wolowitz hair a wig?

Howard's rigid, helmet-like 'do almost seems too good to be true, but Helberg says he's not donning any fake follicles. "I don't wear a wig," he said. "Not yet. My hair is flat-ironed, however."What is his favorite episode?