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The Big Bang Theory: Season 12

12x12 The Propagation Proposition
TV-14

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  • 2019-01-11T01:00:00Z on CBS
  • 19 mins
  • Mark Cendrowski
  • United States
  • English
  • Comedy
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Penny's ex-boyfriend, Zack, and his wife want a baby, but when Zack is infertile, they ask Leonard for help. Also, Koothrappali attempts to mend things with his ex-fiancée, Anu.

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