The Propagation Proposition
Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help; Koothrappali attempts to mend things with his ex-fiancee Anu.
No upcoming airings right now.
How it played
Cast and crew
- Cast
- Johnny Galecki, Jim Parsons, Kaley Cuoco
Past airings
- The Propagation Proposition