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The Big Bang Theory

The Propagation Proposition (Season 12, Episode 12)
TV-PG
TV Episode | 20 min | Comedy, Romance

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.
Read more: Plot summary
Writers
Chuck Lorre (created by) (story) | Bill Prady (created by) | Maria Ferrari (teleplay) | David Goetsch (teleplay) (as Dave Goetsch) & 4 more
Cinematographer
Production Designer
Status
Edit Released
Updated Jan 10, 2019

Release date
Jan 10, 2019 (United States)

Contacts

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Cast

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13 cast members
Name STARmeter Known for
Johnny Galecki
Leonard Hofstadter Leonard Hofstadter   See fewer
Top 5000
Jim Parsons
Sheldon Cooper Sheldon Cooper   See fewer
Top 5000
Kaley Cuoco
Penny Hofstadter Penny Hofstadter   See fewer
Top 500
Simon Helberg
Howard Wolowitz Howard Wolowitz   See fewer
Top 5000
Kunal Nayyar
Raj Koothrappali Raj Koothrappali   See fewer
Top 5000
Mayim Bialik
Amy Farrah Fowler Amy Farrah Fowler   See fewer
Top 5000
Melissa Rauch
Bernadette Rostenkowski Bernadette Rostenkowski   See fewer
Top 5000
Brian George
Dr. V.M. Koothrappali Dr. V.M. Koothrappali   See fewer
Members only
Brian Thomas Smith
Zack Johnson Zack Johnson   See fewer
Members only
Members only
Lindsey Kraft
Marissa Johnson Marissa Johnson   See fewer
Members only
Members only
Chip Chinery
Bob (uncredited) Bob (uncredited)   See fewer
Members only
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MOVIEmeter

Top 500

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Ratings Breakdown

7.2 / 10 | 1,127 votes