The Big Bang Theory Season 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.
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- Episode Number 12
- DVD Season & Episode Number
- Absolute Episode Number
- Originally Aired Thursday, January 10, 2019
- Production Code T12.16012
- Directors Mark Cendrowski
- Writers Chuck Lorre, Jeremy Howe, Maria Ferrari, Dave Goetsch, Steve Holland, Eric Kaplan
- Guest Stars Brian George, Brian Thomas Smith, Rati Gupta, Lindsey Kraft, Shay Ali, Chip Chinery
- Is Movie
- IMDB tt6674708
- Last Updated By Knightmare
- Last Updated 01/14/2019 9:34pm