By Mandi Bierly
Updated November 16, 2010 at 04:34 PM EST
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Sheldon’s female friend Amy is here to stay. At least for this season. Mayim Bialik has been upped to a series regular on CBS’ The Big Bang Theory. According to Michael Ausiello, her deal does not require her to be in every episode, but it will keep her in the picture for the remainder of season 4.

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