The Big Bang Theory Season 12 Episode 12 The Propagation Proposition ( Air Date 2019-01-10 ) Genre Comedy category. Overview "Penny runs into her ex-boyfriend, Zack, who invites her and Leonard to a dinner to meet his newlywed wife. After the dinner the newlywed couple make an odd proposition to Leonard, which makes Penny to freak out. Also, Raj attempts to mend things with his ex-fiancée, Anu.".
The Big Bang Theory Season 12 Episode 12 The Propagation Proposition
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- Stars: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Melissa Rauch, Mayim Bialik
- Director: Brian W. Armstrong, Rick Puccio, John DeChene, Jamie Hitchcock, Adam Faberman, Richard Price, Shannon Timberlake, Anthony Del Broccolo, Jeremy Howe, Tara Hernandez, Andy Gordon, Alexandra Barbone, Tara Treacy, Linda Cowan, Robinson Green, Peter Chakos, Sylvia Surdu, Justin D. Hetzel, Charlie Back, Ryan Berdan, David Goetsch, Eric Kaplan, Maria Ferrari, Faye Woods, Steve Holland, Todd Morris, Vikki McCarter, Kristy Cecil, Robinson Green, Steven Molaro
