Aired Friday 6 December,
10:30am - 11:00amon E4
The Big Bang Theory
Series 12 Episode 12: The Propagation PropositionPenny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help. Then, Koothrappali attempts to mend things with his ex-fiancee Anu.
- Category
- Sitcom
- Original air date
- 10/01/2019
Cast and crew