The Big Bang Theory S12E12: The Propagation Proposition
- Aired: 2019-01-10
- Time: 20:00:00
- Runtime: 30 minutes
Overview
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.