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Big Bang Theory Wedding Portrait: Katey Sagal and Jack McBrayer Crash Penny's Big Day — First Look

Perhaps The Big Bang Theory‘s Season 10 premiere should’ve been titled “The Call Sheet Conundrum.”

In addition to the seven leads, the CBS sitcom’s Sept. 19 opener boasts a guest cast that includes READ MORE

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Will Big Bang Theory's Bernadette Birth an Ausiello? Plus: Final Season Talk, Scoop on Penny's Family Reunion

The Big Bang Theory is heading for “another” wedding as Season 10 opens, paving the way for Katey Sagal to debut as Penny’s mother. Yet this is not the first time the Golden Globe winner has been eyed for a role on the CBS hitcom. READ MORE & WATCH VIDEO Q&A