Big Bang Theory Taping Q&A

I do my best to answer any questions that come up in the comments, but Gina recently left a comment suggesting that I create a Q&A post of sorts:

Something that I would like to see on your blog is maybe a "Q and A" post... for instance, people can submit questions about the tapings and you could answer them. For example, I've always been curious about the actress that voices Howard's mother. Have you seen her at the tapings? Or are her scenes prerecorded?

First, to answer Gina's question - she is at the tapings, and does her lines live with the cast, but always hidden so we can't see her during the scene. But the actress, Carol Ann Susi, then comes out at the closing curtain call with everyone else. (A side note, virtually every time she was in an episode, and thus listed with the cast in that week's program, I'd hear someone in the audience speculating about whether or not that meant we'd actually see her character.)

So if anyone else has questions related to Big Bang Theory tapings - how things are done, cast and crew, whatever - you can leave them here, and I'll answer if I can.

And remember, you still have four days to enter to win Kunal's autograph if you haven't already!