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The Big Bang Theory season 12: How many episodes are in the new series? | TV & Radio | Showbiz & TV | Express.co.uk
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The Big Bang Theory Season 12 Episode 23, 24 Series Finale Review: The Change Constant – The Stockholm Syndrome – Appocalypse
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cbs: 'The Big Bang Theory' sets finale episode for May 16, putting an end to 12-season run - The Economic Times
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