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


Add to Watchlist

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
Brian George, Brian Thomas Smith, Rati Gupta, Lindsey Kraft, Shay Ali, Chip Chinery
7.6/10

Watch The Big Bang Theory s12e12 Now

Season 12 Episode 12 - Video Clips & Extras