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The Big Bang Theory season 12 finale: When is the finale? | TV & Radio | Showbiz & TV | Express.co.uk
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Inside the Big Bang Theory series finale: The Hofstadters, those kids, and that special guest | EW.com
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The Big Bang Theory season 12 finale: How did The Big Bang Theory end? | TV & Radio | Showbiz & TV | Express.co.uk
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