Watch The Big Bang Theory Season 12 Episode 12 - The Propagation Proposition

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The Big Bang Theory Season 12 Episode 12
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.
First Aired: January 10, 2019 - 19 Minutes Runtime
Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Brian George, Brian Thomas Smith, Rati Gupta, Lindsey Kraft, Shay Ali, Chip Chinery
Season 12 Episode 12 - Video Clips & Extras

Also starring Johnny Galecki

Watch The Big Bang Theory - The Propagation Proposition (s12 e12) Online - Watch online anytime: Buy, Rent

The Big Bang Theory, Season 12 Episode 12, is available to watch and stream on CBS. You can also buy, rent The Big Bang Theory on demand at Amazon, Vudu, Microsoft Movies & TV, FandangoNow, Google Play, iTunes online.