Why did Jim Parsons decide it was time to end The Big Bang Theory after 12 seasons? Even he can't quite put his finger on it. "I don't know if it's because I'm an Aries or just because maybe I'm in touch with myself. Whatever it is, once I had that thought, I was like, 'Well, that's your answer,'" the 46-year-old actor tells The Hollywood Reporter. "There was no situation that I was like, 'Well, I've had enough of that.' No. There was nothing like that. It was just…when you know, you know."The Big Bang Theory series finale airs Thursday night on CBS at 8 p.m. ET.
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