The Big Bang Theory
Episode Details

 

 
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The Propagation Proposition
Season 12 - Episode 12
 
 
The Propagation Proposition

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.


 
Production Number:
 
Aired On: Thursday 10th of January 2019 on CBS ( US )
 
Written by: TBA
 
Directed by: TBA
 
Starring: TBA
 

 

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