Aired Wednesday July 3,
9:30pm - 10:00pmon E4 +1
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
- 2019-01-10
Cast and crew