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The Big Bang Theory Season 12 Episode 18

When competitors Pemberton and Campbell charm America on a publicity tour, Sheldon and Amy try to bring Nobel laureates Kip Thorne, George Smoot and Frances Arnold to their side. Also, Halley’s fear of the dark leads to opportunity and conflict for Howard, Bernadette and Stuart.

Episode Title: The Laureate Accumulation

Air Date: 2019-04-04